睾丸间质细胞的生理功能包括（）。 A.产生精子 B.分泌雄激素 _爱下问搜题

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问题单项选择题 A1/A2型题

睾丸间质细胞的生理功能包括（）。

A.产生精子

B.分泌雄激素

C.起血-生精小管屏障（血睾屏障）作用

D.营养和支持生殖细胞

E.分泌雄激素结合蛋白

答案

参考答案：B

解析：睾丸间质细胞的生理功能是分泌雄激素，支持细胞分泌抑制素。

阅读理解

Nowadays, more and more villagers have left to make a living in big cities. As a result, their children have become leftover children and they need more care. The survey below is from villages in Yongzhou, Hunan Province. Three hundred children were chosen to answer the questions.

What they want	Love	Money		Freedom	Control		Something else
	40%	18%		28%	10%		4%
Whom to communicate with	Oneself		Family members			No one
	27%		55%			18%
Whether they can communicate with their parents freely	Yes		A little difficult			No
	46%		44%			10%
The way they prefer to live	Living with parents		Living without parents			No idea
	58%		14%			28%
What they think of their parents’ working in cities	Bad		Good			No idea
	20%		39%			41%
Happiest place	School		Home			Friend’s homes
	48%		34%			18%

小题1:
Of all the five needs, the leftover children need _______ most.

小题2:
Which of the following is TRUE according to the passage?

A．About one out of every two children has no one to talk with.

B．All of the children prefer to stay at home without their parents.

C．About 1/3 of the children think their parents’ working in cities is bad.

D．More than half of the children think it good to live with their parents.

小题3:
How many children think their happiest place is their school?

小题4:
We can learn from the survey that _______.

A．most leftover children want more freedom without parents

B．over 40% of the children have difficulty talking to parents freely

C．all the leftover children dream of making money in big

D．most villagers prefer living a peaceful life in the countryside

填空题案例分析题

下图为我国东南沿海某区域等高线图，读图回答下列问题。

字母A代表地形部位名称（），其顶部与底部的高差至少在（）米以上。