A:to go out; to stay at home
B:to stay at home; go out
C:going out; stay at home
D:staying at home; go out
– ________ of us think the English examination was difficult.
– But I still don't think ________ could pass it.
有两台自动包装机甲与乙,包装质量分别为随机变量X1,X2,已知E(X1)=E(X2),D(X1)>D(X2),则自动包装机____的质量好.
填入下面横线处的语句,与上下文衔接最恰当的一项是( )
他人的微笑,真伪难辨,但________微笑战斗,强似哀兵必胜,那微笑是给予对手的饱含怜悯的批判。