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【判断题】
作用在活塞上的推力越大，活塞运动速度就越快。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Nowadays traditional pencil tests are still more popular than computer tests because ______.
A.
the former are easier
B.
the charges of the former are smaller
C.
the computer is difficult to access
D.
there are more types of exams in the form. of pencil tests
【单选题】－How tired we are! －Yes. ______we have math tests, _______we have physics tests. So many tests.
A.
Sometime, at other time
B.
Sometimes, at other times
C.
Sometimes, at another time
D.
Sometime, at another times
【单选题】某商场(一般纳税人)实行还本销售家具，家具现售价16500元，5年后还本，该商场增值税的计税销售额是( )
A.
16500
B.
16500/(1+17%)
C.
(16500÷5)/ (1+17%)
D.
不征税
【单选题】某商场(增值税一般纳税人)实行还本销售家具,家具现售价16500元(含税),5 年后还本,该商场增值税的计税销售额为()。
A.
16500
B.
16500/5
C.
16500/(1+13%)
D.
5年后纳税，现在不纳税
【单选题】设A={a,b,c},A上二元关系R={(a,a),(b,b),(a,c)},则关系R的对称闭包s(R)是( )
A.
R∪IA
B.
R
C.
R∪{c,a}
D.
R∩IA
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