心理危机应急干预对应分为（）。 A.特别重大事件 B.重大事件 C.较大事件 D.一

一枚火箭由地面竖直向上发射，其v~t图像如图所示，则 

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A．火箭在t₂-t₃时间内向下运动

B．火箭能上升的最大高度为4v₁t₁

C．火箭上升阶段的平均速度大小为

D．火箭运动过程中的最大加速度大小为

仿照例句，另选一事物，分别从正面和反面写出两个有意蕴的句子。

例：竹正面：气节和谦虚的完美结合，使你生机勃勃；反面：节外生枝怎么也掩不住内心的空虚。

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正面：______________________________________

反面：______________________________________

E

Dick was born in a poor family. His father had a small boat and went fishing in the morning and sold the fish in the market in the afternoon. Then he bought some food for his family. When winter came, they were often hungry. One morning the hungry man fell into the river and wasn’t found. Dick’s mother left her three-year-old son without saying good-bye. His aunt had to look after him.
Twenty years passed. Dick became a tall, p man. He found work on a farm. lie worked hard and wanted to get more money. He often went to see his aunt with some nice presents. The woman was very happy but one day she died in a traffic accident. The young man was very sad. After he buried her, he decided to buy a beautiful tombstone(墓碑) for her. He went to town and came in a shop, but all the tombstones were too expensive. He asked, "Do you sell an old tombstone, sir "Yes, we do, sir," answered the shopkeeper. "Is it as expensive as the new one"
"No, it’s much cheaper," said the man. "But another name was engraved (刻) on it. " "It doesn’t matter, " said Dick. "My aunt couldn’t read. \

Dick wanted to get more money to ______.

A．marry a wife

B．give his aunt nice presents

C．buy a farm

D．build a house

“大树底下好乘凉”，这一现象主要体现了

A．生物能影响环境

B．环境形响生物

C．生物能适应环境

D．生物影响生物

区域管制航空器之间的雷达间隔是多少公里（）

A、10

B、20

C、5