广州为什么被称作“羊城”、“花城”？

阅读理解。

    "Mr. Mott often forgets important meetings. The robot will go after him all the time. It listens to everything

he says. It sees everything he does. At night, it watches him sleep. It knows everything about Mr. Mott…"

     It sounds like a wonderful idea, doesn't it? But I'm afraid that Mr. Mott will not get on well with the robot,

because everyone has something he doesn't want others know. It is privacy. Just imagine that there is a video

camera around you all day. How do you feel? When you are taking an exam, a teacher sits in front of you and

watches you all the time. How do you feel?

     Mr. Mott doesn't lose all his memory. At least he remembers that he always forgets. So why can't he do

something for this HIMSELF? He can keep a notebook with him, like most people do. In the notebook he can

write down the things he should do, the persons he should meet and the places he should go.

     Isn't the notebook much cheaper and safer than the robot?

1. "It" in the first paragraph (段落) refers to _____. [ ]

A. Mr. Mott

B. Mrs. Mott

C. the robot

D. a video camera

2. Why does the writer think Mr. Mott will not always get on well with the robot? [ ]

A. Because it is invented by others.

B. Because it can talk with Mr. Mott.

C. Because it can remind (提示；提醒) Mr. Mott of something he forgets.

D. Because it knows something Mr. Mott doesn't want others know.

3. The underlined word "privacy" means _____ in Chinese. [ ]

A. 提供

B. 丧失

C. 特权

D. 隐私

4. Mr. Mott is _____. [ ]

A. handsome

B. forgetful

C. a scientist

D. kind and friendly

牙拔除时不宜使用旋转力的牙为

A．上颌中切牙

B．上颌侧切牙

C．上颌尖牙

D．下颌中切牙

E．下颌双尖牙

液体的温度若低于其泡点温度，称为（）。

A、过冷液体

B、饱和液体

C、过热液体

语句RELEASEALLEXCEPTA能够清除的变量是( )。

A) A1
B) Ab1
C) A2
D) AB

《四川省安全生产条例》自2007年（）起正式施行。

A.1月1日

B.6月1日

C.10月1日

D.11月1日