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【多选题】
在表设计器的“表格工具栏/设计”选项卡中的“索引”按的作用不正确的有()。A.
用于把选定的字段设置为主关键字
B.
用于检索关键字字段
C.
用于弹出设置索引对话框，以便设置索引
D.
用于选择关键字记录数据
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举一反三
【单选题】Which of the following is a beneficial activity of microorganisms?
A.
Some microorganisms are used as food for humans.
B.
Some microorganisms use carbon dioxide.
C.
Some microorganisms provide nitrogen for plant growth.
D.
d.Some microorganisms are used in sewage treatment processes.
E.
all of the above
【单选题】—Do you think I could borrow your dictionary? —______.
A.
Yes, you may borrow
B.
Yes, you could
C.
Yes, help yourself
D.
Yes, go on
【简答题】An is a substance produced by microorganisms that inhibits or kills other microorganisms
【单选题】— Alice told me you called yesterday. — Yes, I had a problem with Jane, ___________I thought you could help me with, but you were not in.
A.
who
B.
whom
C.
that
D.
which
【单选题】Which of the following is a beneficial activity of microorganisms?
A.
Some microorganisms are used as food for humans.
B.
Some microorganisms use carbon dioxide.
C.
Some microorganisms provide nitrogen for plant growth.
D.
Some microorganisms are used in sewage treatment processes.
E.
all of the above
【单选题】Which of the following descriptions about the relationship between microorganisms and human is WRONG?
A.
all microorganisms cause diseases in human
B.
only a few microorganisms are always pathogenic
C.
many microorganisms are potentially pathogenic
D.
most microorganisms are never pathogenic
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