废除强迫劳动公约规定不得以各种理由为借口是是强迫劳动，分别是()。A.作为政治强制或

阅读理解。

1. Before China, how many countries had already sent their astronauts into space?

A. Only one.

B. Two.

C. Three.

D. Four.

2. Shenzhou V circled the earth in space ________.

A. once

B. four times

C. five times

D. fourteen times

3. During the second stage,the Chinese astronauts stayed in space for ________.

A. one day

B. four days

C. five days

D. fourteen days

4. What happened in the third stage?

A. China has sent up Change I to the moon.

B. Chinese astronauts landed on the moon.

C. The moon exploration project is too easy.

D. The government planned to make another space station.

5. Chinese astronauts will possibly walk on the moon around ________.

A. 2010

B. 2015

C. 2017

D. 2020

(8分)以乙烯为原料合成化合物C的流程如下所示：

（1）写出A的结构简式                          。

（2）反应①④的反应类型分别为                  、                      。

（3）写出反应②和④的化学方程式：

②                          ；       ④                             。

仅原核微生物中的某些属种可进氧。（）

"产后血晕者，其状心烦，气欲绝是也。……若下血多且晕者，但烦而已。下血少而气逆者，则血随气上，心下满急……若不急疗，即危其命也。"出自（）

A.《景岳全书》

B.《妇人大全良方》

C.《傅青主女科》

D.《诸病源候论》

E.《经效产宝》

二期梅毒以皮肤粘膜损害为主，其皮肤损害可呈（）

A.斑疹

B.丘疹

C.斑丘疹

D.脓疱疹

E.以上皮损都可有