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【单选题】
将16g硫在给定质量的氧气中燃烧,有如下数据:观察、分析表中数据,下列说法不正确的是 [     ]
A.
第3组数据符合质量守恒定律
B.
第4组数据符合质量守恒定律
C.
反应时硫跟氧气的质量比为1:1
D.
生成物中两种元素质量比为1:1
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【判断题】When the guest wants to pay his bill with the credit card, the cashier should check and see if the card is still valid.
A.
正确
B.
错误
【单选题】No. 2345 Name. Lily Only for student From April 1 st To June 30 th , 2012 If the card is found, please return to any Stage coach driver. The card is used for________.
A.
taking a taxi
B.
travelling by train
C.
taking a bus
D.
entering the college
【单选题】If the card is damaged, the of the card cannot be refunded.
A.
valid
B.
various
C.
value
D.
virus
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【单选题】革兰染色所用试剂的顺序是
A.
复红→碘液→酒精→结晶紫
B.
结晶紫→酒精→碘液→复红
C.
结晶紫→碘液→酒精→复红
D.
复红→酒精→结晶紫→碘液
E.
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A.
has lost
B.
lost
C.
is lost
D.
loses
【单选题】甲贸易公司位于市区,实际占地面积为5000平方米,其中办公区占地4000平方米,生活区占地1000平方米;甲贸易公司还有一处位于农村的仓库,实际面积为1500平方米。已知,城镇土地使用税适用税率每平方米税额为5元。计算甲贸易公司全年应缴纳城镇土地使用税税额的下列算式中,正确的是( )。(2018年)
A.
4000×5=20000(元)
B.
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C.
5000×5=25000(元)
D.
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