在万能保险中，给付方式B的净风险保费变化情况是（）。
A.递增
B.递减
C.不变
D.按规律变化
参考答案：C
Mr. White asked his students________ to meet some Chinese friends from Shanghai.
A．if were they pleased
B．if they are pleased
C．if are they pleased
D．if they were pleased
液化石油气的沸点（）
A、低于零度
B、高于零度
C、为绝对零度
D、为100℃
