简述买方让步的条件。

阅读理解。

　　It was Tom's birthday and he was five years old. He got quite a lot of gifts

his family. His grandpa gave him a beautiful big drum.

　　Of all the gifts, Tom liked his drum best. He made terrible noise with it, but

his mother did not mind. His father was working in the daytime, and Tom was in

bed when he got home in the evening. So he didn't heat the noise.

　　But one of the neighbors didn't like the noise. So one morning she took a

knife and went to Tom's house when he was hitting his drum. She said to him, "

Hello, Tom, do you know there is something very nice inside your drum? Here is

a knife. Open the drum and let's find it."

1. Tom got the drum_____.

A. on his birthday    

B. when he was going to be five  

C. in the evening    

D. on Sunday

2. Tom's _____bought the drum for him.

A. father

B. mother

C. grandpa

D. grandma

3. Tom's father didn't hear the noise because_____.

A. Tom father drum very gently        

B. his father wasn't at home when he played

C. his father was ill              

D. he never played in the day time

4. The neighbor wanted Tom to cut the drum open because _____.

A. there was something nice inside the drum    

B. there was something wrong with the drum

C. she wanted to stop the terrible noise.      

D. she wanted to enjoy the noise of the drum

5. Was there anything very nice in the drum really? _____.

A. No, there was      

B. Yes, there wasn't      

C. No, there wasn't      

D. Yes, there was

集团公司负责指挥导致（）伤亡的冲击地压事故或可能导致工作面停产（）以上冲击地压事故的应急救援工作矿负责（）的应急处置工作。

某乡经济普查办公室在第三次全国经济普查时，将各村上报的《法人单位基本情况》和《个体经营户情况调表》进行初步汇总，全乡的营业收入为2.1亿元。乡领导认为此数偏低，不符合该乡年13亿产值的计划指标，于是编制了《经济普查经济指标分解落实汇总表》，将法人单位营业收入的预计总数由1.9亿元调整到2.9亿元，将个体经营户的营业收入调到8.7亿元。为完成此指标，乡统计人员亲自改动了9家法人单位的普查表，并向各村下达了任务，要求各村按分配的指标将报表填写后重新上报。请根据上述情况，回答下列问题。

该统计员和该乡领导涉嫌统计违法行为有（）。

A.虚报统计资料

B.瞒报统计资料

C.伪造统计资料

D.篡改统计资料

何谓烟雾(Moyamoya)病?

关于天平砝码的取用方法，正确的是（）

A.戴上手套用手取

B.拿纸条夹取

C.用镊子夹取

D.直接用手取

E.都可以