在选择应收账款的函证时，对于大金额账项应采用（）。 A.消极式函证 B.否定式函证

根据首字母提示及句意填入适当的单词。

1. You are supposed to s_____ hands when you meet a Chinese friend.

2. All the students like the e_____ that the physic teachers do every class.

3. What is the s_____? It says you should stop.

4. They arc p_____ to the boy who is playing soccer over there.

5. People k_____ when the people meet in Brazil.

6. Everything was f_____ with me because I was in Japan for the first time.

7. I am f_____. Thanks a lot.

8. I can eat with a k_____ and folk.

9. Remember to take out the r_____ when you leave the room.

10. People are pretty r_____ about time in Colombia

再障的发病机制是多方面作用的结果，目前认为主要有（）

A.物理因素

B.造血干细胞异常

C.造血微环境缺陷

D.免疫机制异常

E.遗传倾向

如图，均匀带正电的绝缘圆环a与金属圆环b同心共面放置，当a绕O点在其所在平面内旋转时，b中产生顺时针方向的感应电流，且具有收缩趋势，由此可知，圆环a

A. 顺时针加速旋转

B. 顺时针减速旋转

C. 逆时针加速旋转

D. 逆时针减速旋转

关于散射线的叙述，错误的是

A．散射线是离开原射线线束的折射光子
B．管电压越高，散射线越多
C．增感屏感度越高，散射线越少
D．在一定厚度内，被照体越厚散射线越多
E．照射野是产生散射线的重要因素

根据有关规定，船舶在泊位停靠期间一般情况下留船人数应（）。

A.不得少于船员总数的2/3

B.不得少于船员总数的1/2

C.不得少于船员总数的1/3

D.根据具体情况决定