已知复数z=(3+i)(3-i)2-i，则|z|=（ ） A．55 B．255 C．5

阅读下列短文，把A—E五个句子填入文中空缺处，使短文内容完整正确。

A farmer’s dog, Dolly, had babies, and the farmer needed to sell them. He painted a sign and put it in his yard.      1     , a little boy walked up to him.

“Sir,” he said, “I want to buy one of your dogs.”

“Well,” said the farmer, “these dogs are very expensive.”

“     2     ” asked the boy.

“Sure,” said the farmer. “Here, Dolly!” he called.

Dolly ran out from the doghouse and four little dogs followed her. The boy became excited.

Then, the little boy noticed another dog. This one was smaller.     3     

“I want that one,” the boy said, pointing to the little dog.

The farmer said: “     4      He will never be able to run and play with you like these other dogs.”

The little boy reached down and rolled up one leg of his pants. He showed a cast (石膏) on his leg and a specially made shoe. He said: “You see, sir,       5     , and he will need someone who understands.”

软坚散结或清热活血，治疗瘰疬或乳癖的是（）

A.治痔肿剂

B.治烧伤剂

C.治瘰核乳癖剂

D.治疹痒剂

E.治疮疡剂

诱导酶是一种植物本来就具有的一种酶。

颅后窝骨折的临床特征为( )。

A．熊猫眼
B．乳突后，枕下区皮下出现淤血
C．脑脊液鼻漏
D．眼镜样血肿
E．脑脊液耳漏

擦金属件属计划卫生，每擦一间大约需要5分钟，而员工每天工作量为（）间。

A、60

B、50

C、80

D、70