风力发电机组的不均衡载荷主要是由下列哪些因素引起（） A.风剪切 B.塔影效应 C.

No.7信令系统的（）级由硬件和软件实现。

请看下列的人名并进行回答。

           Jim Green          Yao Ming

1. 两人的姓分别是：_______ 和 _______

2. 两人的名分别是：_______ 和 _______

3. 对两人的正式称呼分别是：Mr_______ 和 Mr_______

Jenny lived in a town．Her father，Mr．Young，had a shop there and sold clothes in it．The shopkeeper was born in a poor family and was in school no more than a year．He was always sorry for it though he had much money now．He hoped his daughter could become a scientist．But the girl didn’t 1ike anything else except singing．She often went to the concerts，bought a lot of records the famous pop stars made and insisted on listening to the music when she was free．Of course she wanted to be a pop star，too．Her parents wanted to prevent her，but she didn’t listen to

them and they had to agree to her choice．They engaged an old man who was good at music as a private teacher．

Five years passed．Mr．Young bought all kinds of musical instruments for Jenny and they visited some places where the famous singers were born．Of course he spent a lot of money on it．But he found the girl didn’t make any progress．At last the teacher didn’t think the girl could become a singer at all and had to tell Mr．Young about it．The man became angry and said，“Why didn’t you tell me about it earlier? My daughter learned nothing but I paid you month after month!”

“I think you should thank me for it，”said the teacher．“Another teacher, who teaches

badly，is paid more than I was．And I saved much money for you!”

小题1:Mr. Young was in school for a short time because______  ．

A．he was too poor to go on studying

B．he had to help his parents

C．he was weak in his lessons

D．he didn’t like studying at all小题2:Jenny spent much money buying records and went to the concerts in order to ______

A．visit some places

B．know some pop stars

C．become a pop star

D．1earn singing小题3:Mr．Young became angry because______．

A．he paid a lot of money to the teacher

B．his daughter decided to drop music

C．his daughter spent four years on music

D．the teacher taught his daughter nothing

系统疾病史包括（）

A.有无药物过敏史

B.有无牙用材料过敏史

C.是否患有糖尿病

D.是否有传染性疾病史

E.以上都对

起重机工作时，（）进行检查和维护。

A.可以

B.不得