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问题 单项选择题

下列叙述中哪项与左炔诺孕酮不符

A．结构中13-位为乙基
B．结构中17-位有α-乙炔基
C．母体结构属雄甾烷类
D．为光学活性体，具左旋光性
E．孕激素活性约为炔诺酮的100倍，有一定程度的雄激素作用

答案

参考答案：C

连词成句

连词成句，注意大小写和标点符号。

1. danced, in, lots, Chinese, of, she, cities (.)

                                                                              

2. she, these, is wearing, clothes, why (?)

                                                                              

3. father, learn, did, English, your (?)

                                                                              

4. Amy, music, is, now, to, listening (.)

                                                                              

5. was, a, ten, years, he, ago, driver (.)

                                                                              

6. did, grandpa, what, do, your, yesterday ( ?)

                                                                              
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单项选择题

局域网的网络软件主要包括网络数据库管理系统、网络应用软件和

A．网络传输协议

B．TCP和IP

C．网络操作系统

D．服务器和工作站之间的连接软件
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