履约类保函包括（）。
A.投标保函
B.承包保函
C.质量保函
D.分期付款保函
参考答案：A, B, C
Alice was_________the letter from Tom, but it didn't reach her for some reason.
A．expecting
B．waiting
C．waiting for
D．expected
通下法中通腑泄热法称（），导滞通便法又称（）
