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【简答题】
in order to know a foreign language thoroughly(完全地), four things are necessary. Firstly, we must understand the language when we hear it spoken. secondly, we must be able to speak it ourselves, with confidence(自信) and without hesitation(犹豫). Thirdly, we must do much reading. Finally, we must be able to write it. We must be able to make sentences that are correct in grammar. There are no shortcuts to succeed in language learning. A good memory is a great help, but it is not enough only to memorize the rules from a grammar book. it is not much learning by heart long lists ( 一览表 ) of words and their meanings, studying the dictionary and so on. We must learn by using the language. If we are pleased with a few rules we have memorized, we are not really learning the language. We must 'learn through use'. Practice is important. We must practice speaking and writing the language whenever we can. 小题1: the most import things to learn a foreign language are A.understanding and speaking B.listening,speaking,reading and writing C.writing and understanding D.memorizing and listening 小题2: Someone hears and writes English very well, but he speaks it very badly. This is because_____________. A.he doesn’t understand the language when he hears it spoken B.he doesn’t have a good memory. C.he always remembers lists of words and their meanings D.he often hesitates to practice speaking it. 小题3: Which is the most important in learning a foreign language? A.a good memory. B.speaking. C.practice. D.writing. 小题4: “Learn though use” means___________. A.we use a language in order to learn it B.we learn a foreign language in order to use it C.we can learn a language well while we are keeping using it D.both b and c.
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【单选题】如图所示OTL功放电路中,对信号进行放大的主要元件是
A.
三极管T1
B.
三极管T2
C.
三极管T3
D.
三极管T1、T2和T3
【多选题】Col E1是惟一用作基因工程载体的自然质粒,这种质粒(    )。
A.
是松弛复制型    
B.
具有四环素抗性
C.
能被氯霉素扩增    
D.
能产生肠杆菌素
【单选题】对于无冲击电流的电路,如能正确选用低压熔断器熔体的额定电流,则熔断器具有( )保护功能。
A.
短路
B.
过载
C.
短路及过载
D.
失压
【单选题】对热、酸和碱稳定,但易被氧化破坏的维生素包括( )。
A.
维生素A和维生素D
B.
维生素C和B2
C.
尼克酸和维生素E
D.
叶酸和B12
【简答题】ColE1是惟一用作基因工程的自然质粒载体,它具有四环素抗性标记,因而很容易选择。
【单选题】When would Sarah want to hand in her assignment?
A.
Tomorrow.
B.
After the weekend.
C.
Next Monday.
D.
A week after the deadline.
【单选题】When would Sarah like to sit down with James?( )
A.
Today
B.
Some time next week
C.
Any time between today and the end of Friday
D.
This weekend
【单选题】具有上反角的飞机有侧滑角时,会产生
A.
偏航力矩
B.
俯仰力矩
C.
不产生任何力矩
【多选题】在“不忘初心、牢记使命”主题教育工作会议上的讲话中指出,整改落实要防止()
A.
虎头蛇尾、久拖不决
B.
搞纸上整改、虚假整改
C.
以简单问责基层干部代替整改责任落实
D.
以整改为名,层层填表报数,增加基层负担
【多选题】具有上反角的飞机有侧滑角时,会产生:().
A.
偏航力矩
B.
滚转力矩
C.
俯仰力矩
D.
不产生任何力矩
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