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【简答题】
目前,世界上最常用的电视制式有( )、( )、( )和( )。(英文简称)
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反馈参考答案：
举一反三
【简答题】耦合电感 L 1 = L 2 = 3H ,耦合因数 ,则互感 M 为 ( ) 。
【单选题】Writers paint pictures in words and use figurative languages to produce_______ in their description or narration.
A.
ideas
B.
meaning
C.
images
D.
conclusion
【单选题】English writers are more “direct” than Chinese writers means that ______.
A.
Chinese writers don’t express their points in writing
B.
English writers often state the main idea at the end of a paragraph
C.
Chinese writers often express their purpose when they start an essay
D.
English writers often place their central idea in the introductory paragraph
【单选题】English writers are more “direct” than Chinese writers means that ______.
A.
Chinese writers don’t express their points in writing
B.
English writers often state the main idea at the end of a paragraph
C.
English writers often place their central idea in the introductory paragraph
D.
Chinese writers often express their purpose when they start an essay
【多选题】下列哪些元件是该回路的组成元件?
A.
两位五通电磁换向阀
B.
与阀
C.
两位三通手动换向阀
D.
或阀
E.
快速排气阀
F.
两位五通双气控换向阀
G.
气动三联件
【单选题】Roald Dahl was a great children's writer. His dark past helped him paint a picture ________ was different to most other writers.
A.
that
B.
who
C.
/
D.
whom
【简答题】奥迪参加勒芒24小时耐力赛的赛车是: ; 。
【简答题】先化简，再求值： （1）（4a 2 -3a）-（2a 2 +a-1）+（2-a 2 +4a），其中a=2． （2）已知A=3a 2 -5ab-b 2 ，B=-2a 2 +3ab+b 2 ，其中a=-1， b= 2 3 ，求-3（A-B）+2（B+3A）的值．
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