日常交际中，“得体”是语言表达的一项基本要求。完成①②题。 ① 下文是一份请柬中

        Bill and Sue were brother and sister. They studied in the same school. One day, on the way home they saw some nice birds. But they had no money to buy them.Sue had a good idea. On Saturday and Sunday they went to their farm and help their father pick apples. So their father gave them twenty dollars.Sue and Bill went to Mr. King's shop after school, Every one of them bought a bird. One is yellow, the other is green. The yellow one is smaller than green one. They liked them very much.

1. Bill was Sue's      .

A. father

B. mother

C. brother

D. sister

2.       they went to work for money

A. Every day  

B. After school  

C. at night

D. On Saturday & Sunday  

3. They helped their father       on the farm.  

A. clean the room

B. pick apples  

C. water the trees

D. cook supper    

4. Bill and sue bought        in Mr. King's shop.

A. two dogs    

B. two apple    

C. two birds    

D. apples

5. The green bird was       than that yellow one.        

A. bigger      

B. cheaper    

C. better    

D. smaller

(10分)如图15所示，一根长L="2" m的绝缘细管AB被置于匀强电场E中，其A.B两端正好处于电场的左右边界上，倾角α=37°,电场强度E=10³ V/m，方向竖直向下，管内有一个带负电的小球，质量m=10^-4 kg,电荷量q=2×10^-6 C，从A点由静止开始运动，已知小球与管壁的动摩擦因数为0.5，求：

（1）小球运动过程中所受的摩擦力的大小；

（2）则小球从B点射出时的速度。（取g="10" m/s²；sin37°=0.6，cos37°=0.8）

双下肢碾压伤，逐渐肿胀，血压80/60mmHg，尿量15ml/h是（）。

A.感染性休克

B.神经性休克

C.心源性休克

D.损伤性休克

E.失血性休克

如果有人朝你开枪，最好的办法就是跳进游泳池，只要半米多深的水就能把子弹的速度降到非致命的程度.类似现象在宇宙中也会发生.对那些运动速度直逼光速的粒子，充斥在宇宙中的微波背景辐射就犹如一片稠密的海洋.一个粒子只要在其中穿行几亿光年,它的速度就会大幅下降.　　根据上述文字能够推出的是:（ ）

A．稠密的海洋可以减缓粒子的穿行速度

B．跳进游泳池能够抵御子弹的致命袭击

C．在宇宙中穿行，粒子速度会大幅下降

D．微波辐射能缓冲穿行其间粒子的速度

室内贴面砖标准点是用废面砖粘贴在______，贴时将面砖的棱角翘起，______作为镶贴面砖表面平整的标准。做标准点用______=1:0.1:3的混凝土砂浆粘贴。