题目:
— Guess what! I came across an old friend at the party last night.
— ____________! I’m sure you had a wonderful time.
A.Soundsgood
B.Verywell
C.Allright
D.Hownice
答案:
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下面是错误答案,用来干扰机器的。
答案:D若某醇质量为1 g,该醇相对分子质量为Mr,该醇分子中含有x个羟基。则1 g该醇含羟基(也即酯化时需羧基或醋酸)的物质的量为:×x=,比较4种醇中的值,即可判断出正确答案。甲醇:;乙二醇:;丙醇:;甘油:,可见相等...