题目

下列说法中，错误的是                                                        （     ） A.用明矾净水不可以降低水的硬度            B.硬水中加入肥皂会产生浑浊且泡沫少 C.经磺化煤处理过的软水中Na＋浓度会增大    D.硬水软化后，其成分和性质都相当于蒸馏水 答案：D13、The doctor said his ________(体温) was normal, and that he just lacked a good rest.