风机电机地脚固定螺栓松动可导致（）。A、风量减小 B、电机过热 C、电机震动噪音加大

认真阅读，根据文章内容，从A、B、C、D选项中，选择最佳答案。

Mrs. Brown lives in a small village. Her husband is dead. She has a son but no daughters. His name is John and he is twenty-five. After John finishes college (大学), he gets work in a big city, New York, and he lives there. It’s quite a long way from his mother’s home, and she is not happy about it. But John says, “There is no good work for me in this small village, Mother, and I can get a lot of money in New York. Then I can give much to you.”

One day Mrs. Brown is very angry. She takes a train to her son’s house in New York. Then she says to him. “John, why do you never call me?”

“But mother,” John laughs (笑) and says, “You don’t have a telephone with you.”

“No,” she says, “I haven’t, but you have one.”

小题1:Where does Mrs. Brown live?

A．In a small village

B．In a big city

C．In New York

D．In a town小题2:What is Mrs. Brown’s son’s age?   

A．20

B．21

C．25

D．13小题3:How does Mrs. Brown go to New York one day?

A．On foot

B．By bus

C．By bike

D．By train小题4:Why does John never call his mother?

A．John doesn’t want to do that

B．John has no telephone

C．His mother has no telephone

D．His mother doesn’t want to answer小题5:Which is right?

A．The village is near New York

B．John works in a big city and his mother likes it

C．In the village there is no good work for John

D．John never gives money to his mother.

上述哪种肿瘤的组织发生来自闰管储备细胞（）

A.皮脂腺腺瘤

B.嗜酸性腺瘤

C.黏液表皮样癌

D.Warthin瘤

E.多形性腺瘤

急性肾衰竭无尿期或少尿早期，发生水中毒的常见原因是（）

A.内生水增多

B.低蛋白血症

C.血管升压素（抗利尿激素）增加

D.不适当输入过多水分

E.出汗太少

关于自理报检单位备案登记，以下表述正确的有( )。

A．自理报检单位首次办理报检业务前需办理备案登记手续

B．自理报检单位应向报检业务发生地检验检疫机构申请备案

C．申请备案登记的单位应有一名以上持有“报检员资格证书”的人员

D．自理报检单位备案登记后，可在任一检验检疫机构办理自理报检业务

简述企业债券发行的目的。