芳香疗法中的基础油是利用()方法得来的。A、二氧化碳萃取 B、油脂分离法 C、冷压萃取D

题型:单项选择题

问题:

芳香疗法中的基础油是利用()方法得来的。

A、二氧化碳萃取

B、油脂分离法

C、冷压萃取

D、化学溶剂萃取

考点:美容师高级美容师高级美容师题库
题型:单项选择题

阅读下面的文字,完成6-9题。

病毒的秘密

细菌和病毒都是可以致病的微生物,但彼此的特征区别很大。细菌虽然小,要在光学显微镜下才能看见,但它除了拥有生命的基本单位核酸外,还有一大套赖以生存的配套设施,包括作为居住“公馆”的细胞壁,储存营养物质的“仓库”以及进行新陈代谢的“化工车间”。而病毒就更小了,也可怜得多,且不奢谈“库房”和“车间”。就连作为保护外壳的“茅草房”也没有,实际上它只有一个分子大小,用电子显微镜才能看得见。整个家当也只一条表示生命的核酸而已。如果拿人来比喻,细茵最不济的起码也有一条裤子,有只讨饭碗和打狗棒。所以细菌虽然必须在人体内部(或相应条件)的良好环境下才生存较长一段时间,而病毒则像个刚出生的婴儿,除了它的肚和一张吃奶的嘴以外便一无所有,毫无独立生存的能力。故而病毒只能寄生在人或动物的细胞内部,靠“窃取”细胞里的现成营养才能生存。 

结构这样简陋的病毒算不算是生命?生命必须具备的条件有两条:能进行新陈代谢和自我复制。从这点来说,病毒具备了生命的重要特征。但它又不是完整的生命,因为所有生物体的生命特征都寓藏于DNA的双螺旋链中,惟独病毒没有双螺旋,而只有一夺单链,有时还不是DNA而是RNA,所以病毒只具备了部分的生命特征。因而病毒不属于生物界共同的生命形式,或者说只是一种残缺不全的生命形式。 

病毒的生存能力既然这样弱,为什么还会那样猖獗呢?冠状病毒本来致病的能力也并不强,问题在于“变种”两字上。“变种”是遗传物质发生了变异的意思,变异的病毒和原来的不同了,它可能是无害的,但也可能变成“杀伤力”更大的病毒,然而我们不必担心它会因反复变异而使杀伤力增大,因为就杀伤力而言,变异就像赌博,总会有输有赢,不断地赢下去的几率是微手其微的,至少有史以来还没有过这样的记录,如果有过,现在可能就没有我们的存在了。 

必须指出的是“杀伤力”的大小不仅取决于病毒一方,更重要的是人群的免疫力。变种冠状病毒之所以为患甚大,很重要的一个因素是人类还没有接触过这样变种后的新病毒。当人群中有足够多的人产生了抗体之后,这种病毒对人类的威胁也就小得多了。

6、下列对“病毒”这一概念的理解正确的一项是(  ) 

A、体积只有一个分子大小,用电子显微镜才能看得见。 

B、没有像细菌那样有一大套赖以生存的配套设施。 

C、无独立生存的能力,只能寄生在人或动物的细胞内部。 

D、比细菌小,没有细胞结构,有生命特征,能够致病的微生物。 

7、下列对“而病毒就更小了,也可怜得多,且不奢谈‘库房’和‘车间’,就连作为保护外壳的‘茅草房’也没有”这句话的理解,不正确的一项是(  ) 

A、病毒不像细菌那样有一大套赖以生存的配套设施,只有一条“表示生命的核酸”。 

B、使人对病毒“毫无独立生存的能力”的弱点有了直观的认识。 

C、从结构、外形等方面说明病毒生存能力的脆弱。 

D、这个比喻生动地描绘出病毒的“寒碜”形象,使人容易消除对病毒的畏惧感。 

8、根据原文,下列对病毒的特征的阐述,不正确的一项是(  ) 

A、结构简陋,毫无独立生存的能力。 

B、具备生命特征,但不属于生物界共同的生命形式。 

C、变异的病毒可能是无害的,也可能杀伤力更大。 

D、人群中有足够多的人产生了抗体之后,新病毒对人类的威胁也就小得多了。 

9、根据原文所提供的信息,以下推断不正确的一项是(  ) 

A、病毒一旦被人排出体外,就活不了几个小时。 

B、病毒能够摄取外界的物质并加工成需要的能量。 

C、读者透过形象生动的语言可以得到病毒并不可怕的认识。 

D、人产生的抗体所形成的免疫力是病毒变种的克星。

题型:单项选择题

“I was only thirteen when four of my team members and I were chosen by my swim coach to train with the Chinese National Team. The following piece shows how that experience has influenced me.”

The night before I left for China, my mother called me into her room. I entered not knowing what to expect. I sat down at the end of her very neatly-made bed, opposite the bedroom table on which she kept a Ming-style vase illustrated in great detail. She told me that my great-grandmother was still living in the surroundings of Beijing. Her name was Ren Li Ling and she was 97 years old. This was the first time I had ever heard of her.

The dragon on the vase snaked through the flowers and vines(藤蔓)as my mother said, “Pu Pu, look at me. You need to hear this so that when you go to China you will understand. You must keep this knowledge in your heart.”

She told me a story about my grandfather, Ren Li Ling's son, who left Beijing to go to college in Taiwan. She told me how the Chinese civil war kept him away from his mother for fifty years, so neither of them even knew that the other was alive. No one from Taiwan could visit, write, or call anyone in mainland. All lines of communication were cut off.

She told me of my grandfather's devotion to his own children, and how difficult it was for him to send his daughter to America for her education, fearing that same separation. He gave my mother all that he could give — nineteen years of love and fifty years of savings. I learned how my mother, through means only available in this country, would finally be able to unite my great-grandmother with my grandfather again. The dragon curled around the vase, connecting the separate vines. For a fleeting second, I felt it was present in my mother's room. It was all very strange, yet very clear. I began to understand that this trip to China was not just for me; it was for my mother, and her father, and his mother. Now, I had not only a future, but more significantly, a past. I saw the world with new eyes.

And so I went to China and met my great-grandmother. My great-aunt picked me up at the training center, and we rode in a taxi through the crowded city. The noise of the taxi and the city united into a deep roar. We finally stopped in front of a narrow street lined on either side with small one-level houses. As we made our way to a house like all the others, I drew the stares of many people in the street. My great-aunt led me through a rotting(朽烂的)doorway into a room with a furnace(炉子), table, and a rocking chair where an old woman wearing gloves sat facing the doorway, covered with a worn brown blanket. I walked over and immediately embraced this frail woman as if I had known her all my life. My limited, broken Chinese wasn't up to expressing my complicated feelings. And even though I couldn't completely understand what she was saying in her thick Beijing accent, I knew — the same way I knew what my mother had been trying to tell me before I left. Her joy shone through her toothless smile. She wouldn't let go of my hand. I haltingly(结结巴巴地)asked her how she had managed to live such a long life. She answered in words I will never forget, “Hope has kept me alive. I have lived this long because I wanted to see my son before I died.”

My fellow team members must have wondered how two people separated by three generations could be so close. Before this trip, I would have wondered the same thing. And even now, I can't quite explain it. We were as different as two people can be; some 85 years and 8,000 miles apart. We came from two entirely different cultures; yet we were connected by a common heritage(传统).

I stayed for dinner which was cooked in a black iron wok(锅)over the furnace. The meal was lavish(过分丰盛的), prepared in my honor. As I began to eat, with my great-grandmother beside me, I felt the dragon was present. But this time, the feeling didn't pass; the dragon had become a part of me.

My great-grandmother passed away last year at the age of 100. With her highest hopes and wildest dreams fulfilled, I know she died happy.

小题1: The writer’s mother called him into her room to ___________________.

A.prepare him for the trip and warn him against possible problems

B.remind him of his origin

C.ask him to look for his great-grandmother

D.share with him the story of her childhood小题2: The dragon is mentioned several times in the passage because __________________.

A.the vase with the dragon on it is very valuable and beautiful

B.it stands for the blood running in every Chinese

C.it is a sign of the writer’s devotion to his birthplace

D.the writer’s mother hoped the writer would be as strong as a dragon小题3: How old was the writer’s mother when she was sent to America for her education.

A.13

B.16

C.19

D.20小题4:Which of the following can be inferred from the text?

A.The writer’s grandfather was afraid of a war when sending his daughter to America.

B.The hope to see her son again kept the writer’s great-grandmother alive for this long.

C.It was within the writer’s expectation that he could be so close to his great-grandmother.

D.The writer’s great-grandmother was reunited with her son before she died.小题5:Which is the best title for the text?

A.We Share the Same Heritage.

B.Love from My Great-grandmother.

C.A Story from My Mother.

D.An Unforgettable Training Trip.

题型:单项选择题

  2008年5月31目是世界卫生组织发起的第21个世界无烟日。今年无烟日的主题是“无烟青少年”,为此全国各地开展了“中国青少年远离烟草行动”的各种宣传活动,因为20世纪烟草流行导致全球1亿人死亡,如果各国政府不采取有力措施,这个数字将在21世纪变成10亿,其中80%发生在发展中国家,而吸烟的青少年将成为最大的受害者。

  学校为了响应这次行动,组织同学们开展了一系列活动,请按以下要求完成各种活动。

1.请你为学校的“中国青少年远离烟草行动”拟一条宣传标语(20字以内),至少用一种常见的修辞方法。

________________________________________

2.你负责本次活劝的黑板报工作,收到同学们送来的以下资料,请提取共同的信息拟一句话(20字以内),作为黑板报“数据说话”栏目的标题。

  材料1:湖北省对武汉市、荆州市四所中学3108名学生的调查结果特别惊人:尝试吸烟率达21%,高中学生尝试吸烟率达57%,而调研学生竟达72%。

  材料2:杭州中疾病预防控制中心调查结果显示,26%的中学生承认有过吸烟经历,其中3.4%的中学生在最近的30天吸过烟,1.5%的学生在最近的30天内每天至少吸1支烟,而大学生相应的数字是57.2%、199.44%和9.26%

  材料3:广西相关部门对全区6个城市的初中、高中、中等职业技术学校共25766人进行匿名自填问卷,调查的主要内容为尝试吸烟、开始吸烟年龄、经常吸烟、严重吸烟4项指标。结果尝试吸烟率为46.1%,男生为65.5%,女生为28.2%,差异显著;开始吸烟年龄小于等于13岁的占24.1%,不同类型学校之间学生吸烟状况以中等职校最严重,其中中男生更为显著,4项指标分别为84.7%、43.6%、22.1%、3.8%

3.你是学校广播站记看小明,在本次活动中看到这一现象:虽然学校关于禁止学生吸烟的管理规定非常严格,但还是有不少伺学下课后偷偷躲在厕所等地方吸烟。为此,你将采访学校校长。

你会这样说:________________________________________

题型:单项选择题
电气化铁路的输电线常用图所示的方式悬挂在钢缆上.钢缆的A端固定在电杆上,B端连接在滑轮组上.滑轮组由a、b、c三个滑轮构成,配重P由多个混凝土圆盘悬挂在一起组成,配重的总重为G,若不计摩擦和滑轮的重量,则以下说法中正确的是(  )

A.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

B.a为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

C.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为3G

D.a、c为动滑轮,B端钢缆受到滑轮组的拉力大小约为G

题型:单项选择题

病变主要损害横纹肌()

A.肝豆状核变性

B.系统性红斑狼疮

C.Marfan综合征

D.重症肌无力

E.白化病

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