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【简答题】
我们常说三极管具有电流放大作用。其实另外三极管还具有( )作用,当发射结和集电结都处于反偏,即三极管工作在( )区,三极管相当于开关( );当三极管集电结和发射结都处于正向偏置,三极管工作在( )区,相当于一个开关( )。
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【判断题】You must pay tips when you are in western countries to show some politeness.
A.
正确
B.
错误
【简答题】You must pay for tickets when you reserve them.
【简答题】( 1 ) No trip would be complete without experiencing the local food culture. Actually, China has various kinds of delicious food, 1 (include) a wide variety of local snacks ( 小吃 ). Without a doubt, fo...
【简答题】Complete the passage with suitable words from the word bank. A) appreciation B) burden C) inform D) hospitality E) compliment F) welcome G) causal ...
【简答题】Complete the passage with suitable words from the word bank. You may not use any of the words more than once. ※appreciation ※ burden ※ delay ※ compliment ※ entertain ※ casual ※ unannounced ※ welcome ※...
【简答题】语法填空 A Bite of China No trip would be complete without experiencing the local food culture. Actually, China has various kinds of delicious food, 1 (include) a wide variety of local snacks ( 小吃 ). With...
【单选题】You must _______ the traffic lights when you cross the road. [ ]
A.
pay attention to
B.
pay attentions to
C.
pay attention on
D.
pay attentions on
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