射频分配系统RFDS采用（）以便实现更低的插入损失、最大射频功耗和更大的信道容量。A

用所给单词的适当形式填空。

1.  My father goes to Beijing _____ (two) a year.

2.  Look! Lucy and Lily _____ (run) on the playground.

3.  It is good for us to eat more green _____ (vegetable).

4.  In the USA, most children like _____ (eat) junk food.

5.  Can you find any _____ (different) between this photo and that one?

6.  I think everyone has two _____ (foot).

7.  There is an _____ (interest) program on TV every night.

8.  My mother usually goes _____ (shop) on weekends.

9.  —Do you have a _____ (health) lifestyle?

     —Yes, so I'm quite well.

10.  My mother goes to Beijing _____  (two) a year.  

计算log₈9×log₂₇32=______．

关于流产的治疗，下列哪项不正确（）

A.宫颈内口松弛者应行宫颈内口环扎术

B.妊娠早期先兆流产者，可肌注黄体酮

C.难免流产应等待其自然排出

D.不全流产应行吸宫术或刮宫术

E.流产感染应先抗感染治疗后刮宫

柜式空调器开机必备条件包含（）

A.管路上的各阀门处于正常状态

B.组合空调箱各水路畅通

C.组合空调箱风路畅通

D.供电电源的电压在380V±10％范围内

MK系列全液压钻机的回转器由（）、（）和（）组成。