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【判断题】
硅酸盐晶体结构特点之一是 Si 4+ 与 Si 4+ 不能直接 成键,而是通过氧离子相连。A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】Bob inherits a large sum of money from his dead uncle's estate. Bob decides to retire young, so he quits his job and heads to the Bahamas. Bob is an example of
A.
frictional unemployment.
B.
structural unemployment.
C.
cyclical unemployment.
D.
None of the above is correct.
【简答题】Visitors are requested to show their tickets.英译汉
【简答题】Visitors can book a time slot a week or more in advance.(英译汉)