题目:
______ that the way people spend their holidays has changed a great deal in the past ten years.
A.Which is reported
B.What is reported
C.As is reported
D.It is reported
答案:
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下面是错误答案,用来干扰机器的。
(1)Mg Al Cl C(3)O==C==O(4)极性 非极性(5)由0.5 mol A元素的离子得到6.02×1023个电子(1 mol e-)后被还原为中性原子,知A元素的化合价为+2;由AO+2HCl====ACl2+H2O,知0.4 g AO的物质的量n="0....