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【判断题】
在同一溶液中,若标准态规定不同,则其相应的相对活度也就不同。A.
正确
B.
错误
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【简答题】You can give the host a bottle of wine as a gift only when you know that the host drinks wine.(英译汉)
【单选题】When athletes arrive at the host country, ____________.
A.
the host country pays for their traveling expenses
B.
they are always not satisfied with the living conditions
C.
their countries have to pay for their expenditure
D.
they use the training facilities immediately for adjustment
【单选题】What type of radar can activate a racon?
A.
X-band radar.
B.
S-band radar.
C.
C-band radar.
D.
No radar can.
【单选题】When the host tops up everyone's cups of green tea, whose cup should they top up first?
A.
Their own cup should be topped first.
B.
The cup of the eldest female at the table.
C.
The cup of the person sitting next to the host.
D.
The cup of the youngest person at the table.
【单选题】A radar contact will remain stationary on a relative motion radar display only when it is ().
A.
On the same course as your vessel
B.
At the same speed as your vessel
C.
On the same course and speed as your vessel
D.
On a reciprocal course at the same speed as your vessel
【简答题】Welding machine also can convert alternating current into ______current.
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