先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。所填单词必须在答题卡标有题号的横线上完整写出。

Japan is e________ 小题1:its worst crisis（危机）since World War II. A terrible earthquake a________ 小题2: northeast Japan on March 11th. It was measured at magnitude 9.0. This is the s________ 小题3:earthquake in Japan’s recorded history.

The earthquake was f________ 小题4:by a tsunami. Its wave was up to 10 meters high and s________ 小题5:away everything in its path, including houses, cars, buildings and trees.

The number of death r________ 小题6: 6,405 last Friday morning, with 10,259 missing. The number will likely go b________ 小题7:10,000 in one state （县）alone. Survivors along northeastern coast were in great n________ 小题8:of drinking water, electricity and proper food.

Compared with the earthquake, the nuclear leak（核泄漏）had a w________小题9:effect on the people in Japan. An explosion（爆炸）had hit a building at the Fukushima Daiichi Nuclear Station and smoke r________小题10:from the building last Friday. People were told to stay indoors if they lived w________ 小题11:18 miles away from it. People were worried if the radioactive material would be blown over the area because of the wind d________小题12:. According to the WHO, the radiation risk had no sign of threatening（威胁）anywhere else in Asia at present.

March 22nd , 2011

尼古丁对中枢神经系统的作用是（）

A、兴奋

B、抑制

C、先兴奋后抑制

D、先抑制后兴奋