新开办药品生产企业的《药品GMP证书》有效期为 A．1年 B．2年 C．3年 D．4

（选修模块3-5）

（1）下列说法正确的是______

A．康普顿效应和电子的衍射现象说明粒子的波动性

B．α粒子散射实验可以用来确定原子核电荷量和估算原子核半径

C．氢原子辐射出一个光子后能量减小，核外电子的运动加速度减小

D．比结合能越大，表示原子核中核子结合得越牢靠，原子核越稳定

（2）一个高能γ光子，经过重核附近时与原子核场作用，能产生一对正负电子，请完成相应的反应方程：γ→______．

已知电子质量m_e=9.10×10^-31kg，光在真空中的传播速度为速为c=3.00×10⁸m/s，则γ光子的能量至少为______J．

（3）一质量为M的航天器远离太阳和行星，正以速度v₀在太空中飞行，某一时刻航天器接到加速的指令后，发动机瞬间向后喷出质量为m的气体，气体向后喷出的速度大小为v₁，求加速后航天器的速度大小．（v₀、v₁均为相对同一参考系的速度）

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

有机磷杀虫药中毒的主要机制( )

A．促使乙酰胆碱水解

B．抑制呼吸中枢

C．抑制心血管运动中枢

D．抑制胆碱酯酶活性

E．兴奋交感神经系统

把油液的液压能转换成机械能的装置称为执行元件。

物业服务企业哪些行为可认定为物业服务合同的组成部分？