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【单选题】
After a certain amount of credit is used up in each period, the original amount can be automatically restored to use without waiting for the advice of the issuing bank. This credit is :()A.
Automatic revolving letter of credit
B.
Non-automatic revolving letter of credit
C.
Semi-automatic revolving letter of credit
D.
Revolving letter of credit on a time basis
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【简答题】有半导体通以电流 I ,放在均匀磁场 B 中,其上下表面积累电荷如图所示.试判断它们各是什么类型的半导体?(填“P”或“N”,P型半导体中载流子为“正电荷”,N型半导体中载流子为“负电荷”。)
【简答题】根据句子中所给的单词首字母或中文提示，填写正确的单词。 小题1:–I often a with my mother. What should I do? –Maybe you should say you’re sorry. 小题2:It is not p to laugh at others when they make mistakes. 小题3:–What do your parents d...
【单选题】– Do you want to say something to your teammates who didn’t win the match? -- Come on and never ______ hope.
A.
give in
B.
give up
C.
give away
D.
give out
【单选题】What do the experts say you should NOT do when writing a personal statement for graduate studies.
A.
You should be authentic and personal – you want to be different from other applicants.
B.
You should be professional in how you describe your graduate study enterprise.
C.
You should make up experiences you've never had and write what you think the review committee wants to hear.
D.
You should show fluent English: get someone to proofread your work for spelling, punctuation, and grammar errors.
【单选题】下列对厌氧生物滤池的特点叙述错误的是（）。
A.
不需要污泥回流
B.
具有较高的COD c r去除率
C.
AF的去除率主要在上部进行
D.
AF适用于处理污染物主要是可溶性有机物的工业
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