问题 判断题

HSGC-MS方法测定水中挥发性有机物,萃取时使用的氯化钠若是优级纯,则不需处理可直接使用。

答案

参考答案:错

解析:氯化钠应在350℃下加热6h,除去吸附的有机物。

单项选择题
阅读理解

The French Revolution broke out in 1789. At the time France was in a crisis. The government was badly run and people's lives were miserable. King Louis XIV tried to control the national parliament and raise more taxes. But his effort failed. He ordered his troops to Versailles. The people thought that Louis intended to put down the Revolution by force. On July 14, 1789, they stormed and took the Bastille, where political prisoners were kept. Ever since that day, July 14 has been the French National Day. Louis tried to flee the country in 1792, to get support from Austria and Prussia. However, he was caught and put in prison. In September 1792, the monarchy(君主制) was abolished_. In the same year, Louis was executed. A few months later his wife, Marie also had her head cut off. The Revolution of France had frightened the other kings of Europe. Armies from Austria and Prussia began to march against France. The French raised republican armies to defend the nation. The Revolution went through a period of terror. Thousands of people lost their lives. In the end, power passed to Napoleon Bonaparte.

小题1:What's this passage about?

A.France. 

B.King Louis.

C.The French Revolution.

D.Europe.小题2:Which did not happen in 1789?

A.The French Revolution broke out.

B.The national economy was developing rapidly.

C.The government wasn't well run.

D.King Louis XIV was in power.小题3: What does the underlined word "abolished" mean?

A.Put off.

B.Established.

C.United.

D.Ended.小题4:What was NOT the effect of the Revolution?

A.July 14 has become the French National Day.

B.It brought some impact on the other European kings.

C.Louis's wife, Marie was killed.

D.The king tried to control the national parliament.