两容量相等的1000Uf/100V电容，并联后的耐压值是（）V。A、200B、100

We spent a day in the country, picking wild flowers. With the car full of flowers we were going home. On our way back my wife noticed a cupboard outside a furniture shop. It was tall and narrow. “Buy it,” my wife said at once. “We’ll carry it home on the roof rack(行李架), I’ve always wanted one like that.”

What could I do? Ten minutes later I was 20 pounds poorer, and the cupboard was tied onto the roof rack. It was six inches long and eighteen inches square, quite heavy too.

In the gathering darkness I drove slowly. Other drivers seemed unusually polite that evening. The police even stopped traffic to let us through. Carrying furniture was a good idea.

After a time my wife said, “There’s a long line of cars behind. Why don’t they overtake, I wonder?”

In fact a police car did overtake. The two officers inside looked at us seriously as they passed. But then, with great kindness, they led us through the rush-hour traffic. The police car stopped at our village church. One of the officers came to me.

“Right, sir,” he said. “Do you need any more help?”

I was a bit puzzled. “Thanks, officer,” I said. “You have been very kind. I live just on the road.”

He was staring at our car: first at the flowers, and then at the cupboard. “Well, well,” he said, laughing. “It’s a cupboard you’ve got there! We thought it was, something else.”

My wife began to laugh. Then the truth hit me like a stone between the eyes. I smiled at the officer. “Yes, it’s a cupboard, but thanks again.” I drove home as fast as I could.

小题1:It can be inferred from the passage that______.

A．other drivers let the couple go first, because the husband did not drive fast

B．the cupboard cost less than 20 pounds

C．the husband, in fact, would rather not buy the cupboard

D．all the cars followed the couple’s小题2:The police will be more polite to those who are______.

A．in great sorrow

B．driving in the gathering darkness

C．driving with wild flowers in the car

D．carrying furniture小题3:What did the police officer think of the cupboard?

A．It was so expensive that it needed their help

B．It was a box for a dead person to be buried in.

C．There might be something stolen in it.

D．It was a big box with some bomb in it.小题4:What did the husband think of the whole matter?

A．It was very strange.

B．He took great pride in it.

C．He was puzzled at it

D．He felt embarrassed.

患者，女性，62岁，主诉右膝关节间断性肿胀半年，其他关节无症状，曾经穿刺抽液发现暗红色关节液，检查右膝关节滑膜肥厚，关节积液，首先考虑的初步诊断是（）

A.舍格伦综合征

B.类风湿关节炎

C.骨性关节炎

D.结核性滑膜炎

E.色素沉着绒毛结节性滑膜炎

慢性胃炎最可靠的诊断方法是（）

A.胃镜

B.钡餐

C.胃黏膜活组织病理检查

D.胃镜+幽门螺杆菌检测

E.胃镜+活组织病理检查

关于弛豫，下列哪一种叙述是正确的（）

A.纵向弛豫表示Z轴磁场的恢复

B.Z轴磁场的下降称为纵向弛豫

C.XY平面磁场的下降称为纵向弛豫

D.XY平面磁场的增加称为纵向弛豫

E.纵向弛豫就是T值

简述染色体畸变的原因。