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【单选题】
在一定条件下，一个反应达到平衡的标志是A.
各反应物和生成物的浓度相等
B.
各物质浓度不随时间改变而改变
C.
△ rGmf = 0
D.
正逆反应速率常数相等
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【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, while Sandy can make 6 tables or 18 chairs. Given this, we know that
A.
Mike has an absolute advantage in chairs.
B.
Mike has a comparative advantage in tables.
C.
Sandy has an absolute advantage in chairs.
D.
Sandy has a comparative advantage in chairs.
【单选题】—Excuse me Could you wake me up when my friend____ here? —Of course. But we still don't know when your friend _____ here.
A.
comes; will come
B.
comes； comes
C.
will come; comes
D.
will come； will come
【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that the opportun...
A.
Mike is 1/5 chair and 1/3 chair for Sandy.
B.
Mike is 5 chairs and 3 chairs for Sandy.
C.
Mike is 1/3 chair and 1/5 chair for Sandy.
D.
Mike is 3 chairs and 5 chairs for Sandy.
【单选题】Excuse me,could you please tell me my car?
A.
why to stop
B.
where to park
C.
where can I park
D.
how can I park
【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that the opport...
A.
1/5 chair for Mike and 1/3 chair for Sandy.
B.
1/5 chair for Mike and 3 chairs for Sandy.
C.
5 chairs for Mike and 1/3 chair for Sandy.
D.
5 chairs for Mike and 3 chairs for Sandy.
【单选题】Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that
A.
Mike has an absolute advantage in chairs.
B.
Mike has a comparative advantage in tables.
C.
Sandy has an absolute advantage in chairs.
D.
Sandy has a comparative advantage in chairs.
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