问题
单项选择题
不是睾丸支持细胞的生理功能是
A．分泌雄激素
B．营养和支持生殖细胞
C．起血-睾屏障作用
D．产生精子
E．分泌雄激素结合蛋白
答案
参考答案：A
解析：睾丸间质细胞的生理功能是分泌雄激素，睾丸支持细胞的作用是：①营养和支持生殖细胞；②起血睾屏障作用；③分泌雄激素结合蛋白；睾丸精曲小管上皮的生精细胞产生精子。
搜题请搜索小程序“爱下问搜题”
不是睾丸支持细胞的生理功能是
A．分泌雄激素
B．营养和支持生殖细胞
C．起血-睾屏障作用
D．产生精子
E．分泌雄激素结合蛋白
参考答案：A
解析：睾丸间质细胞的生理功能是分泌雄激素，睾丸支持细胞的作用是：①营养和支持生殖细胞；②起血睾屏障作用；③分泌雄激素结合蛋白；睾丸精曲小管上皮的生精细胞产生精子。
| Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation. About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag. |
Which of the following is TRUE about my mother
A．She enjoyed removing others’ drinks
B．She became more and more forgetful
C．She preferred to do everything by herself
D．She wanted to keep her house in good order