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【单选题】
电路如图所示,RF引入的反馈为()
A.
串联电压负反馈
B.
串联电流负反馈
C.
并联电压负反馈
D.
并联电流负反馈
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参考解析:
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举一反三
【简答题】在比较典型的内部过电压中,主要有()和()两大类。
【简答题】触发器是具有( 第一空 )功能的基本电路单元,是构成( 第二空 )必不可少的重要组成部分,它能存储( 第三空 )位二进制代码。
【简答题】翻译:我得了流感。 I've got the __________.
【简答题】当太阳电池外电路开路时,其端电压被称为 。
【单选题】听力:What does the man say about delivery?
A.
Q: What does the man say about delivery? M: Hello. Yes? W: Hello. Is that the sales department? M: Yes, it is. W: Oh, well, my name's Jane Kingsbury of GPF Limited. Hmm, we need some supplies for our design office. M: Uh, what's sort? W: Well, first of all, we need one complete new drawing board. M: A DO44 or DO45? W: Uh, I don't know. What's the difference? M: Well, the 45 costs 15 pounds more. W: Hmm, so what's the total price then? M: It's 387 pounds. W: Does that include value added tax? M: Oh, I'm not sure, most of the prices do. Yes, I think it does. W: Hmm, what are the boards actually made of? M: Oh, I don't know. I think it's a sort of plastic stuff these days. It's white anyway. W: Hmm, and how long does it take to deliver? M: Oh, I couldn't really say. It depends on how much work we've got and how many other orders there are to send out, you know. W: Ok. Now we also want some drawing pens, ink and rulers and some drawing paper. M: Oh, dear, the girl that takes orders for supplies isn't here this morning, so I can't take those orders for you. I only do the equipment, you see. W: OK. Well, perhaps I'll ring back tomorrow. M: So do you want the drawing board then? W: I'll have to think about it. Thanks very much. I'll let you know. Goodbye. M: Thank you. Goodbye. A.It is not his responsibility.
B.
It will be free for large orders.
C.
It costs 15 more for express delivery.
D.
It depends on a number of factors.
【简答题】段落翻译: 我小的时候特别盼望过年,往往是一过了腊月,就开始掰着指头数日子。对于我们这种焦急的心态,大人们总是发出深沉的感叹,好像他们不但不喜欢过年,而且还惧怕过年。他们的态度令当时的我感到失望和困惑,现在我完全能够理解了。我想长辈们之所以对过年感慨良多,一是因为过年意味着一笔开支,二是飞速流逝的时间对他们构成巨大压力。 备注 :原文选自诺贝尔文学奖得主莫言的散文《过去的年》。莫言以写小说见长,但...
【单选题】What does the man mean? 查看材料
A.
It is impossible for Toby to pass the exam.
B.
He doesn' t know whether Toby will pass the exam or not.
C.
Toby will certainly pass the exam.
D.
Toby doesn't know the way to the classroom.
【简答题】革兰阳性菌和革兰阴性菌细胞壁共有的化学成分是( )。
【单选题】感官鉴定法是凭借实践经验和理性知识,通过感觉器官,对烹饪原料的( )及性质进行的检验。
A.
色彩
B.
气味
C.
弹性
D.
外观特征
【单选题】感官鉴定法是凭借( ),通过感觉器官,对烹饪原料的外观特征及性质进行的检验。
A.
实践手段和感性知识
B.
实践经验和理性知识
C.
实践结果和化学知识
D.
实践进程和物理知识
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【单选题】听力:What does the man say about delivery?
A.
Q: What does the man say about delivery? M: Hello. Yes? W: Hello. Is that the sales department? M: Yes, it is. W: Oh, well, my name's Jane Kingsbury of GPF Limited. Hmm, we need some supplies for our design office. M: Uh, what's sort? W: Well, first of all, we need one complete new drawing board. M: A DO44 or DO45? W: Uh, I don't know. What's the difference? M: Well, the 45 costs 15 pounds more. W: Hmm, so what's the total price then? M: It's 387 pounds. W: Does that include value added tax? M: Oh, I'm not sure, most of the prices do. Yes, I think it does. W: Hmm, what are the boards actually made of? M: Oh, I don't know. I think it's a sort of plastic stuff these days. It's white anyway. W: Hmm, and how long does it take to deliver? M: Oh, I couldn't really say. It depends on how much work we've got and how many other orders there are to send out, you know. W: Ok. Now we also want some drawing pens, ink and rulers and some drawing paper. M: Oh, dear, the girl that takes orders for supplies isn't here this morning, so I can't take those orders for you. I only do the equipment, you see. W: OK. Well, perhaps I'll ring back tomorrow. M: So do you want the drawing board then? W: I'll have to think about it. Thanks very much. I'll let you know. Goodbye. M: Thank you. Goodbye. A.It is not his responsibility.
B.
It will be free for large orders.
C.
It costs 15 more for express delivery.
D.
It depends on a number of factors.