已经在苏州完成验收及鉴定试验的月球车，明年将随“嫦娥3号”登陆月球。月球表面周围

发生意外穿髓后首选的处理方法是

A．扩大穿髓孔

B．用碘酊消毒

C．直接盖髓术

D．封快失活剂

E．麻醉下拔髓

根据句意用所给动词的适当形式填空。

小题1:How do you like our city? Wonderful. I ___(stay) here for another two days.

小题2:Everyone in our class except the twins ____ (hope) to visit the Great Wall.

小题3:He won’t go camping next week because he is busy ______( study) for exams.

小题4:No smoking here . Oh, sorry. I ______ ( not see ) the sign.

小题5:I think every one of them  ________(solve) the maths problem at the moment.

小题6:The people in the northern part of China often make fires ____ (keep) warm.

小题7:Could you tell me when ______ (leave) for New York?

小题8:If you ______(not be ) careful, you will make mistakes.

小题9:There ______( be) an interesting film tonight, is there?

小题10:Look! There is a wallet _______ (lie) on the ground.

辅食的添加原则是()

A．由少到多

B．由细到粗

C．由稠到稀

D．需要时可几种一起添加

E．由一种到多种

氧枪有三层同心钢管组成，内管道是（）通道，内层管与中层管之间是冷却水的（）水通道，中层管与外层管之间是冷却水的（）水通道。

环管工艺装置原料丙烯的纯度工艺指标设计要求大于（）。

A、97%

B、98%

C、99%

D、99.2%