氢气和氧气之间发生化学反应的过程可用如图所示微观描述． （1）写出该反应的化学

根据句意及首字母的提示,补全单词

1. One of the most dangerous sports in the world is mountain c_________.

2. There were no man-made s_________ as big as the Great Wall.

3. The train was traveling at an ordinary s_________.

4. F_________ is one of the biggest problems in the world.

5. It's dangerous to climb the highest mountain because thick clouds c_________ the top of the mountain.

金女士，29岁。妊娠40周，临产后出现协调性宫缩乏力，宫口开大5cm，胎囊凸，无头盆不称。首先应遵医嘱给予的处理是

A．镇静剂

B．等待产程自然进展

C．缩宫素静脉滴注

D．人工破膜后静脉滴注缩宫素

E．剖宫产术

点燃的火柴竖直向上，火柴杆不易继续燃烧，其原因是  [ ]

A．火柴杆温度达不到着火点

B．火柴杆着火点高

C．火柴杆潮湿，不易继续燃烧

D．火柴杆接触的氧气少

我国甲公司欲于英国乙公司签订销售合同出口鞋子到英国，贸易术语使用不正确的是（）。

A.FOBSHANGHAI

B.CIFDALIAN

C.CFRLONDON

D.CIPLONDON