用科学计数法表示：570000=（ ）。

（）在票据上的签章不符合票据法和票据实施管理办法规定的，票据无效.

A.背书人

B.承兑人

C.出票人

D.保证人

Mr. Lang worked in a factory. As a driver, he was busy but he was paid much. His wife was an able woman and did all the housework. When he came back, she took good care of him and he never did anything at home. So he had enough time when he had a holiday. A few friends of his liked gambling(赌博) and he learned it soon. So he was interested in it and nearly forgot anything except gambling. He lost all his money and later he began to sell the television, watches and so on. His wife told him not to do it but he didn’t listen to her. She had to tell the police. He and his friends were punished for it. And he was hardly sent away. After he came out of lockup(拘留所), he hated her very much and the woman had to leave him.

It was New Year’s Day. Mr. Lang didn’t go to work. He felt lonely and wanted to gamble again. He called his friends and they came soon. But they were afraid the police would come. He told his five-year-old son to go to find out if there were the policemen outside. They waited for a long time and didn’t think the police would come and began to gamble. Suddenly opened the door and in came a few policemen.

“I saw there weren’t any policemen outside, daddy,” said the boy, “so I went to the crossing and asked some to come.”

小题1:Mrs. Lang did all housework because _______.

A．she couldn’t find any work

B．she thought her husband was tired

C．her husband spent all time in gambling

D．she wouldn’t stop her husband gambling小题2:_______, so he was put into lockup.

A．Mr. Lang often gambled

B．Mr. Lang was late for work

C．Mr. Lang didn’t help his wife at home

D．Mr. Lang wasn’t polite to the police小题3:Which of the following is right?

A．The boy hoped his father to be put into lockup again.

B．The boy thought his father needed some policemen.

C．The boy hoped his father to stop gambling soon.

D．The boy hoped his mother to come back.

何谓量反应和质反应

封驳制度

细菌的繁殖方式是（）

A.有性孢子结合

B.分支断裂繁殖

C.二分裂

D.复制

E.孢子出芽