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【单选题】
税收的（ ）是指政府征税以后，税款即为国家所有，不再归还给纳税人，也不向纳税人直接支付任何代价或报酬。A.
强制性
B.
固定性
C.
直接性
D.
无偿性
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举一反三
【单选题】______ is discussed at the meeting must be kept secret.
A.
What
B.
That
C.
Which
D.
Whether
E.
When
【简答题】Implementation of the meeting must be pursued with vigor.
【单选题】of them has arrived yet. So I'm afraid that the meeting must be held next time.
A.
All
B.
None
C.
Each
D.
Either
【单选题】What she( ) to us at the meeting must be true .
A.
announced
B.
announces
C.
announce
D.
announcing
【单选题】The meeting must be held before Wednesday, because John is _______leave on Thursday.
A.
arranged about
B.
scheduled to
C.
planning for
D.
being about to
【单选题】The meeting must be held before Wednesday, because John is _____ leave on Thursday.
A.
arranged about
B.
scheduled to
C.
planning for
D.
be about to
【简答题】如图为显微镜结构图，请据图回答下列问题．在【】内填字母，横线上写结构名称 （1）对物像具有放大作用的是[______]______和[______]______． （2）能较大范围地升降镜筒的是[______]______． （3）能反射光线的是[______]______．（4）观察时把玻片放在[______]______，并用[______]______压紧玻片．使要观察的标本对准[_____...
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