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搜题
【单选题】
从关系中挑选出指定的属性组成新关系的运算称为A.
“选取”运算
B.
“投影”运算
C.
“联接”运算
D.
“交”运算
手机使用
分享
复制链接
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反馈参考答案：
举一反三
【单选题】What is NOT stated about the membership?
A.
The membership fee should be paid.
B.
It can be used at the Sunset Beach Hotel.
C.
It is valid for one year.
D.
It can be used with other promotional offers.
【简答题】The membership of REN21.
【单选题】After you_______the attached form, please send it to us within 7 working days to be eligible for our two-year warrant program.
A.
will complete
B.
completed
C.
having completed
D.
have completed
【单选题】please send us samples ( )for our reference
A.
airmail
B.
by airmail
C.
airmailing
D.
by airmailing
【单选题】For more information, please send an e-mail, ____ you can also include your advice to us.
A.
when
B.
where
C.
which
D.
that
【简答题】游标卡尺的尺身每一格为1mm，游标共有50格，当两量爪并拢时，游标的50格正好与尺身的49格对齐，则该游标卡尺的读数精度为（）。
【单选题】Membership in the is a prerequisite for membership in the International Finance Corporation.
A.
International Bank for Reconstruction and Development
B.
International Development Association
C.
Multilateral Investment Guarantee Agency
D.
International Monetary Fund
【简答题】节奏听写7 输入代号,字母小写,连续输入,不要空格。
【单选题】If you want to apply for membership, click ______.
A.
Try it free for three months
B.
Learn more about membership
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