判断下列体系的熵变小于0的是　（　） Ａ．水蒸气冷凝成水 　Ｂ．CaCO3(

The famous Chinese mathematician(数学家) Hua Luogeng was born in Jintan County, Jiangsu province in 1910. When he was young, life was very difficult for his family. Still, the boy took great interest in math.

In the summer of 1931, he was fortunate(幸运的) enough to become an assistant in the Math Department(系) of Qinghua University, where he spent every moment he could find working and studying, and he finished his compulsory(必修的) math course all by himself in only 13 months!

Between the years of 1936 and 1938, he was further studying in Cambridge University in the U.K. In 1950, together with his family, he returned to China from the USA. He said, “I’m Chinese, and I’ll do my best for my motherland.”

So he did. He devoted(贡献) all his life to the math study and won the great fame(荣誉) for our country.

He died for heart trouble in 1985 while lecturing in Japan. People will always remember him as a great scientist.

小题1: Which of the following is not true?

Hua Luogeng is a famous Chinese mathematician.

Hua Luogeng died in China.

Hua Luogeng was born in Jingtan County.

Hua Luogeng comes from Jiangsu.

小题2: The word “assistant”in this passage means “____” in Chinese.

帮手    B.服务员    C.助教     D.教授

小题3:Hua Luogeng was ____ in 1937. Which of the following cannot be chosen?

A．in China

B．abroad

C．in Cambridge

D．in England小题4: From the story we can guess that Hua Luogeng was born in ____.

A．a rich family

B．a poor family

C．a mathematician family

D．a fortunate family

中心静脉压测压的导管不能进行静脉输液，但可作静脉推药。

4a²+b²+______=（2a-b）²．

对物流服务质量进行管理控制达到提升物流服务质量的一系列活动称为( )。

A．物流服务质量管理
B．物流服务
C．质量管理
D．物流管理

请简述稀硝酸镁含硝高时对硝镁加热器、蒸发器、镁泵以相应的管道的影响？