大多数哺乳动物和人类,精子必须在雌性生殖道内停留一段时间方能获得使卵子受精的能力,这

题型:单项选择题 A1型题

问题:

大多数哺乳动物和人类,精子必须在雌性生殖道内停留一段时间方能获得使卵子受精的能力,这种现象称为()

A.受精

B.着床

C.顶体反应

D.精子获能

E.精子去获能

考点:临床执业助理医师生殖生殖题库
题型:单项选择题 A1型题

阅读理解。

     The students were having their chemistry (化学) class. Miss Li was telling the children what water was

like. After that, she asked her students, "What's water?" No one spoke for a few minutes. Miss Li asked

again, "Why don't you answer my question? Didn't I tell you water is like?" Just then a boy put up his

hand and said, "Miss Li, you told us that water has no color and no smell. But where to find such kind

of water? The water in the river behind my house is always black and it has a bad smell." Most of the

children agreed with him. "I'm sorry, children." Said the teacher, "Our water is getting dirtier and

dirtier. That's a problem."

1. The students were having their _____ class.

A. English

B. Chinese

C. chemistry

D. moths

 2. Miss Li was telling the children what _____ was like.

A. water

B. air

C. earth

D. weather

3. A boy said, "The water in the river behind my house is always _____."

A. white

B. black

C. clean

D. clear

4. Most of the children _____ the boy.

A. agreed with

B. wrote to

C. heard from

D. sent for

5. The water in the river has color and smell because it is getting _____.

A. more and more

B. less and less

C. cleaner and cleaner

D. dirtier and dirtier

题型:单项选择题 A1型题

下列关于匀速圆周运动的说法,正确的是(  )

A.它是变速运动

B.其加速度不变

C.其角速度不变

D.周期越大,物体运动得越快

题型:单项选择题 A1型题

2岁小儿,高热5天,眼球结膜炎、颈淋巴结肿大、杨梅舌、一过性皮疹及关节炎,首先诊断为

A.淋巴结结核

B.风湿热

C.类风湿关节炎

D.川崎病

E.传染性单核细胞增多症

题型:单项选择题 A1型题

“神也者,妙万物而为言者也。”出自()。

A.《论语》

B.《易传》

C.《礼记》

D.《老子》

题型:单项选择题 A1型题

被称为中国古代十大名关的有()

A、南津关

B、鬼门关

C、友谊关

D、娘子关

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