【判断题】【消耗次数：1】
线性空间对两种基本运算：向量的加法和数乘是封闭的。
①
正确
②
错误
参考答案：
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数据库恢复技术中，数据冗余的两种基本形式是[填空]和数据备份。
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Xiao Liu has worked in the plant for only a few days. He is a green hand at doing this job.划线部分应该翻译成“新手”
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正确
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错误
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正确
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【多选题】
I _____________ that he will pass the examination.
①
have no doubt
②
am sure
③
have no idea
④
am sorry
【多选题】
______________ , we went home.
①
The problem solved
②
The problem is solved
③
When the problem solved
④
When the problem was solved
【多选题】
_____________ , her paper (论文) is of greater value than yours.
①
If all things considered
②
If all things are considered
③
AIl things considered
④
AIl things are considered
【单选题】
Pierre is Canadian, but he didnt go to school in Canada. He was _____________ in France.
①
educated
②
meant
③
avoided
④
considered