离体肝线粒体中加入氰化物和丙酮酸，其P/O比值是A．3B．2C．0D．1

计算机账务处理系统中，某种凭证类型一旦使用，则年度内( )。

A．不能变动
B．不能删除
C．能修改但不能删除
D．不能修改或删除

如图所示为一种质谱仪示意图，由加速电场、静电分析器和磁分析器组成。已知：静电分析器通道的半径为R，均匀辐射电场的场强为E。磁分析器中有垂直纸面向外的匀强磁场，磁感强度为B。问：（1）为了使位于A处电量为q、质量为m的离子，从静止开始经加速电场加速后沿图中圆弧虚线通过静电分析器，加速电场的电压U应为多大？（2）离子由P点进入磁分析器后，最终打在乳胶片上的Q点，该点距入射点P多远？

对于新电动机绝缘电阻不小于（）．

A、２ＭΩ

B、１ＭΩ

C、０．５ＭΩ

D、１．５ＭΩ

Read the passage carefully and then translate the underlined sentences into English or Chinese. Write your answer on your answer sheet.

Howard Carter is one of the most famous explorers the world has ever known. He was brave and loved to visit and explore new places. During his life, he discovered many amazing things.小题1:他天资聪颖，对家乡之外的世界充满了好奇心when he was very young.

Howard Carter never went to school, but learnt to draw from his father. 小题2:By the 1920s, he had become an explorer, searching for the tombs of the Egyptian kings. He discovered a great fortune in jewels and gold, along with the preserved bodies of dead kings. 小题3:这些经过处理的遗体就是为人所知的木乃伊. In 1922, Howard Carter made his most amazing discovery of all, in the Valley of the Kings, in Egypt, where he found the tomb of King Tutankhamun.

However, not long after the tomb had been opened, people in Carter’s team began to fall ill and die strangely.小题4:Within seven years, 21 people who had something to do with the opening of the tomb died.

Some people say the deaths were just coincidence. 小题5:Others believe that they were in connection with a mummy’s curse. However, still others believe that there is a scientific explanation, because inside the tombs there are many viruses.

外寄生虫对宿主的危害方式