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【简答题】
现要用EDTA滴定法测定某水样中Ca 2+ 的含量，则用于标定EDTA的基准物应为 (A) Pb(NO 3 ) 2 (B) Na 2 CO 3 (C) Zn (D) CaCO 3
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【简答题】1 Bob is often late for school because he always gets up late. This makes his teacher mad. He needs to buy something to wake him up in the morning. 2. Tim likes listening to music when he is free...
【单选题】当旧的经济关系日益腐朽,新的经济关系日益形成时,旧的道德体系也必将为新的道德体系所代替。人们的道德水平必然随着社会经济关系由低级到高级的发展而不断进步。这说明( )。
A.
社会经济关系的性质决定着社会道德体系的性质
B.
阶级社会中的道德是有阶级性的
C.
社会经济关系的变化必然引起道德的变化
D.
社会经济关系中所表现出来的利益决定着道德的基本原则和主要规范
【简答题】It takes two hours for Kevin to ______ here every day. No wonder he is often late.
【简答题】Listen to a conversation and choose the best answer to each of the following questions. 1. What is the relationship between Sharon and Daniel? A. Teacher and student. B. Boyfriend and girlfriend. C....
【单选题】He is often late for school, so the teacher is ______ with him. [ ]
A.
agree
B.
angry
C.
pleased
D.
careful
【单选题】He is often late for class, ____ always makes the teachers unhappy. [ ]
A.
what
B.
which
C.
that
D.
it
【单选题】-The new worker is often late for work. -Tell him he_ answer for it if he goes on behaving like that.
A.
shall
B.
may
C.
will
D.
must
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