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【单选题】
下列SQL命令全部属于数据定义语句的是（）A.
CREATE，DROP，ALTER
B.
CREATE，DROP，SELECT
C.
CREATE，DROP，GRANT
D.
CREATE，DROP，UPDATE
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【单选题】There isn't enough food at home. And we _____ some drinks as well.
A.
need
B.
needn't
C.
need to
D.
don't need to
【单选题】We need enough food to ___________ our strength.
A.
worsened
B.
sporadically
C.
maintain
D.
buffet
E.
servings
【简答题】实训 3 连线题 1. Admission Free a. 禁止机动车辆通行 2. Security Check b. 路滑慢行 3. Duty Free Shop c. 恕不出售 4. Guard Against Damp ...
【简答题】We all need physical exercise.Exercise uses up food we eat and keeps the body full of energy.It works your muscles and makes your heart work hard so as to send blood to your muscles.So,exercise makes ...
【单选题】—There is enough food for the birds, isn't ____? —No, we need to get some. [ ]
A.
it
B.
there
C.
that
D.
this
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