SMT电路基板（SMB）的主要特点？

A little boy went to a telephone booth (电话亭) at the cash counter of a store and made a phone call. The store owner looked at him and listened to the conversation.

Boy: “Lady, can you give me the job of cutting your lawn (草坪)?”

Woman (at the other end of the phone line): “No, thank you. I already have someone to cut my lawn.”

Boy: “Lady, I will cut your lawn for half the price the person who cuts your lawn now.”

Woman: “I’m very satisfied with the person who cuts my lawn.”

Boy (with more perseverance 执着) : “Lady, I’ll even sweep the floor and the stairs of your house for free.”

Woman: “No, thank you.”

With a smile on his face, the little boy hung up the phone. The store owner, who was listening to all this, walked over to the boy.

Store owner: “Son... I like your attitude (态度). I like that positive (积极的) spirit and would like to offer you a job.”

Boy: “No, thanks.”

Store owner: “But you were really asking for one.”

Boy: “No, Sir. I was just checking my performance (表现) at the job I already have. I am the one who is working for that lady I was talking to.”

小题1:In fact, how many people are mentioned (提及) in the story?  _____________.

A．2

B．3

C．4

D．5小题2:The boy said to the lady that he would even sweep her floor and stairs for free because ___________.

A．he wanted her to let him continue his job

B．he thought that the lady was too poor

C．the lady thought the money she paid the boy was too much

D．he wanted to know if he did his job well enough and couldn’t be replaced (取代) by others.小题3:Which is TRUE according to the story?

A．The boy was angry with the lady.

B．The store owner wasn’t kind-hearted.

C．The lady wanted to find another person to do the boy’s job.

D．The boy was happy to know that the lady was satisfied with his performance.小题4:The best title for the story is “_____________”.

A．Asking for a job

B．Self-appraisal (自我测评)

C．The lady and the boy

D．The boy and the store owner

吗啡类镇痛药主要不良反应为（）

A.依赖性

B.血液系统反应

C.肝损害

D.肾损害

E.血细胞减少

什么是给养？

中国是世界上最大的电视剧生产国。

零件与零件相配合时都有一个公差的差异，即最大极限尺寸与最小极限尺寸之差，通常我们称为（）。