方式1.实数有加法运算,那么下列集合的关系呢? 方式2.班里有会弹钢琴的,会打拳击

题型:问答题

问题:

方式1.实数有加法运算,那么下列集合的关系呢? 方式2.班里有会弹钢琴的,会打拳击的会……(给出集合的并集的定义) 方式3.前面学习了集合,集合的表示、基本关系,接下来呢……

分析三种引入方式的特点。

考点:教师资格考试高级中学数学2015年上半年高级中学数学考试真题
题型:问答题
These days picture news is very popular with young people. Here are some photos chosen by five students in Class One in XinHua Middle School.
小题1: China’s first Hello Kitty theme restaurant was opened on Dec.23 in the capital of China. It’s all pink and sweet inside the restaurant. The table cloth is pink, so are the chairs, ceiling and floor, even the lamp light shines soft and rosy. Dining at Hello Kitty Dreams Restaurant costs about 160 yuan per person.
小题2:Dustin and Sara from North Georgia College and State University (NGCSC) of the United States Perform Peking Opera at Liaocheng University in China’s Shandong Province. Eighteen students from NGCSU came to China to study Chinese culture during the summer vacation.
小题3:Located in Miyun County, northeast of Beijing Fuling Mountain is a national-level forest reserve. As the mountain is cloudy and foggy all the year round, Fuling Mountain then began to be called Wuling Mountain. It is regarded as the Yellow Mountain in North China.
小题4:Bill Gates, chairman of Microsoft, the world’s largest personal-computer software company, attended an antismoking event ahead of the 25th World. No-Tobacco Day falls on May 31 every year.
小题5:Sleep isn’t a waste of time. It lowers blood pressure, reduces stress and strengthens your immune system(免疫系统). And not having enough sleep increases your risk of memory problems, headaches, heart disease and so on.
 
下面是5位同学英语课堂演讲标题。请结合标题内容,阅读上面5段语言材料,找出他们能够利用上的素材。(5分)
A. No-smoking Struggle             B. Chinese Culture Study
C. Yellow Mountain in North China.    D. Pink and Sweet Restaurant
E. Sleeping Influence.
题型:问答题

患者,男性,62岁。慢性咳嗽、咳痰10余年。有冠心病病史5年,平时无症状。昨日因胃溃疡大出血急诊手术治疗,手术后第1天出现呼吸困难,伴发热。动脉血气分析(呼吸空气时):pH7.48,PaO250mmHg(6.7kPa),PaCO230mmHg(4.0kPa);心电图未见明显ST-T改变;D-二聚体0.5ng/L;胸片示双肺纹理增粗,普遍模糊。

该病例的诊断下列不可能的是()

A.肺栓塞

B.急性呼吸窘迫综合征

C.肺部感染

D.肺不张

E.急性左心衰竭

F.急性心肌梗死

题型:问答题

在DNA的析出与鉴定实验中,可以将DNA滤液放在60~70℃的恒温水浴箱中保温10~15min,这样处理的目的是[ ]

A.利用DNA对高温的耐受性,长期保存DNA

B.利用DNA在NaCl溶液中的溶解度受温度影响,使DNA析出

C.利用DNA和蛋白质对高温的耐受性不同,使蛋白质变性,从而与DNA分离

D.利用蛋白质对高温的耐受性比DNA强,使DNA和蛋白质分离

题型:问答题

对实验对象进行混染分配,符合()

A.对照的原则 

B.重复的原则 

C.随机化原则 

D.节约化原则 

E.最优化原则

题型:问答题

药物的治疗指数是指

A.ED50与LD50的比值
B.LD50与ED50的比值
C.LD50与ED50的差
D.ED95与LD5的比值
E.LD5与ED95的比值

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