下列放射性核素中毒性权重系数不属于A类的是（）。
A.75Se
B.89Sr
C.111In
D.125I
E.131I
参考答案：C
You used to be short, _____? [ ]
A. weren't you
B. didn't you
C. don't you
D. used you
急性胃肠炎患者粪便的性状是（）
A.灰白色便
B.粥样稀便
C.米泔样便
D.细条状便
E.柏油样便
