为检查涂料中颜料的某些特性，使用的光源是（）。 A.太阳光 B.紫外线灯 C.日光灯

Man: Betty is always complaining about her son.
Woman: She should take care of my three teenage boys and see what it’s like.
Question: What does the woman mean().

A. Betty’s life is easy compared with her own.

B. Betty has a more difficult life than she does.

C. Betty would like to take care of the three boys.

D. Taking care of her three teenage sons is easy.

肺痈溃脓期治法为（）

A．风寒感冒 

B．风热感冒 

C．气虚感冒 

D．阳虚感冒 

E．表寒里热感冒

Se是人体必需微量元素，下列关于和说法不正确的是

A．和互为同位素

B．和的质量数均为34

C．和分别含有44和46个中子

D．和含有相同的电子数

电动机的五大电磁性能指标是堵转电流、堵转转矩、（）、功率因数和效率。