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【单选题】
旅游经济活动中,“就地消费”的旅游产品换汇率高于其他参与国际市场竞争的产品,其原因是( )
A.
旅游产品的运输费用低
B.
免受外国关税壁垒影响
C.
出口保险税率优惠
D.
处于外贸顺差优势
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【单选题】电源电压为+12V的555定时器,组成施密特触发器,控制端开路,则该触发器的回差电压△U T 为( )V
A.
8
B.
6
C.
4
D.
12
【简答题】A.Make a pot of coffee. B.Try different brands of coffee. C.Drink less coffee. D.Get a different coffee pot.
【单选题】电源电压为 +12V 的 555 定时器、组成施密特触发器,控制端开路,则该触发器的回差电压 △V T 为
A.
4V
B.
6V
C.
8V
D.
12V
【单选题】电源电压为+12V的555定时器组成施密特触发器,控制电压输入端接+7V电压,则该触发器的回差电压△V T 为( )。
A.
4
B.
8
C.
3.5
D.
7
【单选题】I'm afraid the coffee I spilt will make a ______ on the tablecloth.
A.
mark
B.
speckle
C.
stain
D.
dot
【简答题】The responsible period of the carrier for the loss of or damage to the cargo as well as delay in delivery under( )is between the time of carrier taking over the goods and the time of delivery.
【单选题】下列为美国自由舞时期的代表人物的是
A.
露丝·圣·丹尼斯
B.
洛伊·富勒
C.
崔莎·布朗
D.
皮娜鲍什
【单选题】You can make instant coffee by simply _______ .
A.
adding hot water
B.
grinding and roasting the coffee beans
C.
putting it in the microwave oven
【单选题】Put in the Coffee and ( )it, you will make the drink.
A.
twist
B.
stir
C.
roll
D.
hake
【单选题】______ no coffee left, they had to make do with tea.
A.
There being
B.
It being
C.
It was
D.
There was
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