关于SDS-PAGE的描述，错误的是（）。 A.凝胶介质形成立体多孔网状结构 B.具

阅读短文，判断下列各题的正误，正确写“A”，错误写“B”。

     Some famous places to visit are built by people. Others famous places are made by nature. For example,

in the northeast of the United States, there was a famous rock on a high mountain that looked just like an old

man. He had lots of hair, a big nose, and a beard (胡须). People called him "The Old Man of the Mountain"

and every year more than a million people came to look at him. Scientists think that the stone face had been

there for about 17,000 years.

     In may 2003, there was very bad weather near the Old Man of the Mountain. There were very high winds

and the temperature was very cold. The sky was so cloudy that people couldn't see the stone face for many

days. As soon as the storm (风暴) was over, people looked for the Old Man and they couldn't see him. They

discovered that he had fallen into pieces (破碎). The stones that made his face sank down the mountain. A

number of scientists climbed up to see if they could repair the stone face, but they had to give up. They

figured out (推断) that the damage (损坏) from the weather was just too bad.

( )1. The Old Man of the Mountain was built by people.                              

( )2. The stone face has large collar (衣领) around its neck.                       

( )3. About 17,000 visitors in a year saw the Old Man of the Mountain.             

( )4. During the storm and after it ended, people couldn’t see the stone face.     

( )5. Scientists think high wins and cold caused the Old Man to fallen into pieces.

我国的一辆国际列车行驶于A国境内时，该国公民甲与B国公民乙产生矛盾，甲用刀将乙砍成重伤。对甲的犯罪行为：()

A．不能适用我国刑法

B．应当适用我国刑法

C．可能适用我国刑法

D．选择适用我国或A国刑法

真正制约地下铁路建设的因素是( )问题。

A．城市交通流量
B．城市人口
C．技术
D．经济性

下列选项中，属于职工个人福利的有（）

A.带薪假期

B.工伤赔偿金

C.加班费

D.冬季取暖补贴

E.上下班交通费补贴

乘人必须在（）上下乘人器。

A.乘人器机头

B.上下人员位置

C.乘人器机尾