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【简答题】
国家标准规定公差带由标准公差和基本偏差组成,标准公差决定公差带的 ,基本偏差决定公差带相对零线的 。
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【简答题】根据对话内容，填入适当的单词，使对话完整。（将答案填入对话后的横线上） Ann: Hello. is Tina there? Tina: Hello, Ann. 1______ is Tina. Ann: Could I borrow your CD player tomorrow, please? Tina: Sorry. It's not a very good 2______. Could ...
【单选题】差分放大电路的主要特点是( )
A.
有效放大差模信号，有力抑制共模信号
B.
既放大差模信号，又放大共模信号
C.
有效放大共模信号，有力抑制差模信号
D.
既抑制差模信号，又抑制共模信号
【单选题】Tina is helpful at home. She often_______.
A.
watches TV
B.
plays ping-pong
C.
cleans the room
【单选题】The phrase 'Hard news'(Line 3, Paragraph 3) can be paraphrased as ______
A.
news on human-interest features.
B.
news on consumer health sections.
C.
news on economic and social issues.
D.
news on entertainment and sports.
【简答题】The first day of school we were surprised to know a new classmate. I 1 around when a gentle hand touched my shoulder. I found a little 2 lady with a warm smile. She said, “Hi! I’m 87 years old. Can I ...
【简答题】It used to be that Christmas, with a little help from Blue Peter, was about adding the personal touch. We'd sit there for hours cards and gifts for family and friends, knowing that the thought ...
【单选题】The boy has told palpable lies about his absence of classes.
A.
wise
B.
foolish
C.
obvious
D.
touchable
相关题目：
【单选题】差分放大电路的主要特点是( )
A.
有效放大差模信号，有力抑制共模信号
B.
既放大差模信号，又放大共模信号
C.
有效放大共模信号，有力抑制差模信号
D.
既抑制差模信号，又抑制共模信号