运动精度

阅读理解

       My name is Tommy. I come from Canada. I'm thirteen years old. I have big blue eyes and blond

hair. I'm tall. My shirt is red and my pants are white. Now I'm in Class Seven, Grade Eight. Look! That

boy in a green coat is my friend, Paul. He's from the U.S.A. He's twelve. He is strong. We are in the same school, but we are in different classes. Paul gives his photo to me. I give my photo to him, too. We are

good friends.

根据短文内容, 回答下列问题.

1. Is Tommy from the U.S.A.?

______________________________

2. What does Tommy look like?

______________________________

3. Who is strong?

______________________________

4. Who is the boy in green?

______________________________

5. Does Paul have Tommy's (Tommy的) photo?

______________________________

提供比较优惠的信用条件，可增加销售量，但也会付出一定代价，主要有( )。

A．应收账款机会成本

B．坏账损失

C．收账费用

D．现金折扣成本

下列关于长江沿江地带城市的叙述，正确的是[ ]

A．沿江城市多是凭借自身的自然资源发展起来的

B．上海、南京、杭州、重庆是本地带的经济、文化、交通中心

C．长江中下游地区城镇分布密集，上游地区沿江城市稀少

D．长江沿江地带已经形成了六大城市密集区

某火电厂锅炉烟气采用袋式除尘器除尘，测得除尘器进口含尘浓度为28g/m³，除尘器出口含尘浓度为18mg/m³，除尘器进口烟尘的粒径分布如下表：假设除尘器出口粉尘粒径均小于10μm，问除尘器捕集PM10微细粒子的效率至少是多少（）

A.99.73%

B.99.84%

C.99.89%

D.99.91%

工人工作日的最高界限取决于

A．资本家的良心
B．剩余价值率的高低
C．生理因素
D．道德因素