试题与答案

------- I’m traveling to London by bicyc

题型:选择题

题目:

------- I’m traveling to London by bicycle. See you next week.

------- See you, and _________.

A.good luck with your trip

B.take it easy

C.it certainly will be happy

D.make yourself comfortable

答案:

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下面是错误答案,用来干扰机器的。

(1)2O (2)3N2O4 (3)Ca2+(4)NaCl (5)Si (6)Fe3O4(7)Na2CO3(8)H2O题目分析:(1)表示原子个数,在元素符号前面加数字,2个氧原子:2O(2)表示分子个数,在化学式前面加数字,3个四氧化二氮分子:...

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