《确保网络空间安全的国家战略》是()发布的国家战略。 A.英国 B.法国 C.德国

题型:单项选择题

问题:

《确保网络空间安全的国家战略》是()发布的国家战略。

A.英国

B.法国

C.德国

D.美国

考点:微生物检验技术(主管技师)相关专业知识综合练习相关专业知识综合练习题库
题型:单项选择题

以下是有关实验技术的叙述,正确的是(  )

A.培养大肠杆菌的营养物质一般都可以用于培养禽流感的病原体

B.光学显微镜的物镜(10×)和目镜(5×)组合可将被观察的物体的面积放大50倍

C.观察青菜叶片表皮细胞的正常结构时,一定会用到光学显微镜、载玻片、盖玻片和水

D.在观察一只苍蝇的外部形态特征时,借助放大镜比借助光学显微镜观察效果更好

题型:单项选择题

实验桌上提供了符合要求的实验器材:电压表三块,电流表一块,未知阻值定值电阻两只,滑动变阻器一个,电源一个,开关一个,导线若干.两个电阻串联接在电路中,电阻R1的功率为P1,电阻R2的功率为P2,电阻R1、R2的总功率为P,请你利用提供的器材,设计实验证明,P=P1+P2

(1)在这个实验中,自变量是______.

(2)在虚线框内画出实验电路图;

(3)在虚线框内画出实验表格;

(4)在这个实验中,改变自变量的方法是______.

(5)写出第一次实验完整的步骤.______.

题型:单项选择题

妊娠期循环系统的生理变化,下列选项中正确的是()

A.心脏容量增加,心率减慢

B.收缩压变化不大,舒张压略升高,脉压差缩小

C.心排出量不变,对活动的反应不如未孕妇女明显

D.多数孕妇心尖区和肺动脉瓣区可听到柔和的舒张期杂音

E.妊娠对上肢静脉压无影响,但下肢静脉压升高,侧卧位时静脉压可改善

题型:单项选择题

(B)

When I was six, Dad brought home a dog one day, who was called "Brownie". My brothers and I all loved Brownie and did different things writh her. One of us would walk her, another would feed her, then there were baths, playing catch and many other games, Brownie, in return, loved each and every one of us. One thing that most touched my heart was that she would go to whoever was sick and just be with them, we always felt better when she was around.

One day, as I was getting her food, she chewed up one of Dad’s shoes, which had to be thrown away in the end. I knew Dad would be mad and I had to let her know what she did was wrong. When I looked at her and said, "Bad girl," she looked down at the ground and then went and hide. I saw a tear in her eyes.

Brownie turned out to be more than just our family pet, she went everywhere with us. People would stop and ask if they could pet her. Of course she’d let anyone pet her. She was just the most lovable dog. There were many times when we’d be out walking and a small child would come over and pull on her hair. She never barked or tried to get away. Funny thing is she would smile. This frightened people because they thought she was showing her teeth. Far from the truth, she loved everyone.

Now many years have passed since Brownie died of old age. I still miss days when she was with us.

Which of the following best describes Brownie()

A. Shy

B. Polite

C. Brave

D. Caring

题型:单项选择题

人民法院委托其他法院对某些事项进行调查,被委托法院必须在( )日内完成调查。

A.15

B.30

C.7

D.10

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