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【单选题】
在0.5mol Na2CO3 中含有:A.
1mol CO3 2－
B.
1mol Na +
C.
6.02×10 23 molNa+
D.
1.5个O
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【简答题】A. The women don't want to go to any more barbecues. B. The guests are late because of the weather. C. Everybody should help with the cooking. D. The weather wasn't good on last barbecue.
【简答题】透过曲线是分析( )得到的。
【简答题】LETTER 1 Dear Ann, T am going to give a dinner party next month.I want my guests to enjoy themselves and to feel comfortable.What is the secret of giving a successful party? Sarah LETTER 2 Dear Mary, ...
【单选题】Why doesn't Charlene give personal reactions to what her guests say?
A.
She doesn't care about personal issues.
B.
She doesn't want to reveal her opinion.
C.
She doesn't want her guests to stop talking.
【单选题】In the U.S.A,guests will say"______"to the host who offers something they don't want
A.
.No,thanks
B.
.Yes,please
C.
Help yourself
D.
I don't want it
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