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【单选题】
下列现象与氢键有是（　　） ①乙醇可以和任意比互溶 ②冰的密度比液态水的密度小 ③氨易液化 ④水分子高温下也很稳定 ⑤邻羟基苯甲酸的熔、沸点比对羟基苯甲酸的低 ⑥乙硫醇（CH 3 CH 2 -SH）比乙醇（CH 3 CH 2 -OH）的熔点低的原因是乙醇分子间易形成氢键．
A.
①②⑤
B.
①②③⑤⑥
C.
①②⑤⑥
D.
①②③
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