问题
单项选择题
下列说法哪项是正确的
A．生育期大约有500个卵母细胞发育成熟
B．导致排卵的内分泌调节为排卵前血LH/ FSH峰的出现
C．雌激素对垂体、下丘脑有正及负反馈作用
D．排卵发生于月经周期的第14天
E．卵泡期长短是固定的
答案
参考答案：B
解析：导致排卵的内分泌调节为排卵前血LH/FSH峰的出现，排卵多发生在下次月经来潮前14天左右。
搜题请搜索小程序“爱下问搜题”
下列说法哪项是正确的
A．生育期大约有500个卵母细胞发育成熟
B．导致排卵的内分泌调节为排卵前血LH/ FSH峰的出现
C．雌激素对垂体、下丘脑有正及负反馈作用
D．排卵发生于月经周期的第14天
E．卵泡期长短是固定的
参考答案：B
解析：导致排卵的内分泌调节为排卵前血LH/FSH峰的出现，排卵多发生在下次月经来潮前14天左右。
阅读下面的短文，掌握其大意，然后从各题所给的选项中选出一个最佳选项。 Tick, tick, tick! Good morning, Jim! It’s 6:30 now. It’s time 1 up. Do you know me? I’m your new friend. My name is Clock. Look 2 me. I have no feet, 3 I can walk with my hands. I have no mouth, but I 4 speak to you. Now please listen to 5 . Today is Monday. You have many things to do. Classes 6 at 8:00. You have four classes in the morning and two classes in the afternoon. After 3:40 you have a basketball match 7 Class Two. You come 8 at 5:40. You have supper at 6:00. You 9 CCTV news at 7:00. And you go to bed at 9:30. Now please get up quickly and have your breakfast or（否则）you will be 10 .
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