系统应具有（）措施，防止雷电击毁设备，引起井下瓦斯爆炸。A、防雷 B、防静电 C、防

在用玻璃管给某井量油时，如果共计量油5次，则应该用（）计算量油时间。

A、T₀=（T₁₁+T₂₁+T₃₁+T₄₁+T₅₁）

B、T₀=（T₁₁+T₂₁+T₃₁+T₄₁+T₅₁）/5

C、T₀=（T₁₂～T₁₁）+（T₂₂～T₂₁）+（T₃₂～T₃₁）+（T₄₂～T₄₂）+（T₅₂～T₅₁）

D、T₀=（T₁₂～T₁₁）+（T₂₂～T₂₁）+（T₃₂～T₃₁）+（T₄₂～T₄₁）+（T₅₂～T₅₁）/5

阅读理解。

     A man once said how useless it was to put advertisements in the newspaper."Last week," he said,"my

umbrella was stolen from a London church. As it was a present, I spent twice its worth in advertising, but

didn't get it back."

     "How did you write your advertisement?" asked one of the listeners, a merchant.

     "Here it is," said the man, taking out of his pocket a slip cut from a newspaper. The other man took it

and read,"Lost from the City Church last Sunday evening, a black silk umbrella.. The gentleman who finds

it will receive ten shillings on leaving it at No. 10 Broad Street."

     "Now," said the merchant,"I often advertise, and find that it pays me well. But the way in which an

advertisement is expressed of extreme importance. Let us try for your umbrella again, and if it fails, I'll buy

you a new one."

     The merchant then took a slip of paper out of his pocket and wrote: "If the man who was seen to take

an umbrella from the City Church last Sunday evening doesn't wish to get into trouble, he will return the

umbrella to No.10 Broad Street. He is well known."

     This appeared in the newspaper, and on the following morning, the man was astonished when he opened

the front door. In the doorway lay at least twelve umbrellas of all sizes and colors, and his own was among

them. Many of them had notes fastened to them saying that they had been taken by mistake, and begging the

loser not to say anything about the matter.

1. What is an advertisement?

A. A news item.

B. public opinions.

C. One way to voice one's view.

D. A public announcement on papers, TV, etc.

2. The result of the first advertisement was that __________.

A. the man got his umbrella back

B. the man wasted some money advertising

C. nobody found the missing umbrella

D. the umbrella was found somewhere near the church

3. The merchant suggested that the man should ________.

A. buy a new umbrella

B. go on looking for his umbrella

C. write another and better advertisement

D. report the police

4. "If it fails, I'll buy you a new one," suggested that the merchant ________.

A. was quite sure of success

B. wanted to buy him a new umbrella

C. didn't know what to do

D. was rich enough to buy one

5. The story is mainly about _________.

A. a useless advertisement

B. how to make an effective advertisement

C. how the man lost and found his umbrella

D. what the merchant did for the umbrella owner

2010年9月，小张同学刚来到新学校时，心里非常高兴，但随着学习的进展，他对数学老师讲课的方式产生了不适应，再加上班长选举落选带来的失落，不会与同学交往而导致的孤独，父母对他的过高期望造成的压力，让他感到烦恼、焦虑和不安。所幸的是，小张同学及时地意识到了这些，并进行了调整。他主动与老师交流，说出自己的真实想法，寻求老师的指导和帮助；改进学习方法，尽快掌握各学科的特点与学习规律；积极参加各项集体活动，以开放的心胸与更多的人交朋友；用记日记、写心灵感悟、读名人故事、欣赏音乐、制订自我肯定计划等具体方法来调整心态。

请回答：

（1）请你设想小张同学自我调节后的结果。

________________________________________________________________________________

（2）对小张同学的做法进行评析，并说说对自己有什么启示？

________________________________________________________________________________

无压给料与有压给料相比，前者分选效果（）。

A.好

B.差

C.相同

D.都有可能

以下属于淘宝网的基本功能的是（）

A.开店销售宝贝

B.交易店铺管理

C.互动社区

D.搜索购买宝贝