如图所示电路中，下列情况中错误的是 [ ] A．S1和S2均断开时，L1、L2与

根据语境,补全单词。

1. The room is so dirty. Let's give it a t_____ cleaning.

2. A number of nations have already been in armed c_____ over water, and

   reduced rainfall in the west of the US has resulted in huge forest fires.

3. A c_____ needle always points north.

4. The flight's d_____ time was 10am.

5. The sea turtle is an e______ species.

6. The brain c_____ of grey and white matter.

7. In the article, his privacy was e_____ to the public.

8. I haven't contacted Tom for ages. It is b_____ my dreams to have received

   a letter from him.

下列哪一项不是栀子的功效（）。

A.泻火除烦

B.清热利湿

C.凉血解毒

D.清胃止呕

E.消肿止痛

神经细胞在接受一次有效刺激而兴奋后，下列哪一个时期兴奋性为零（）

A.超常期

B.低常期

C.相对不应期

D.绝对不应期

E.快速复极末期

坡屋面挂瓦的操作工艺顺序：准备工作、（）、（）、（）。

规划阶段坝址区的工程地质勘察在有重大工程地质问题段，以及近期开发工程的坝段可布置（）。

A.工程物探

B.大量勘探工作

C.少量勘探工作

D.少量现场原位力学试验