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【单选题】
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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 ( ) 。
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【单选题】已知两耦合电感L1=L2=6H,互感M=3H,则耦合系数k=( )。
A.
0.5
B.
2
C.
3
D.
6
查看完整题目与答案
【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
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【简答题】已知：a 2 ﹣b 2 =（a﹣b）（a+b）；a 3 ﹣b 3 =（a﹣b）（a 2 +ab+b 2 ）；a 4 ﹣b 4 =（a﹣b）（a 3 +a 2 b+ab 2 +b 3 ）；按此规律，则： （1）a 5 ﹣b 5 =（a﹣b）（ _________ ）； （2）若a﹣ =2，你能根据上述规律求出代数式a 3 ﹣ 的值吗？
查看完整题目与答案
【多选题】下列哪些是该回路的组成元件()。
A.
油泵
B.
三位四通电磁换向阀（y型）
C.
两位四通电磁换向阀
D.
压力继电器
E.
溢流阀
F.
单作用缸
查看完整题目与答案
【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
查看完整题目与答案
【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．
查看完整题目与答案
相关题目：
【简答题】耦合电感 L 1 = L 2 = 3H ,耦合因数 ,则互感 M 为 ( ) 。
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【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
查看完整题目与答案
【单选题】已知两耦合电感L1=L2=6H,互感M=3H,则耦合系数k=( )。
A.
0.5
B.
2
C.
3
D.
6
查看完整题目与答案
【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
查看完整题目与答案
【简答题】已知：a 2 ﹣b 2 =（a﹣b）（a+b）；a 3 ﹣b 3 =（a﹣b）（a 2 +ab+b 2 ）；a 4 ﹣b 4 =（a﹣b）（a 3 +a 2 b+ab 2 +b 3 ）；按此规律，则： （1）a 5 ﹣b 5 =（a﹣b）（ _________ ）； （2）若a﹣ =2，你能根据上述规律求出代数式a 3 ﹣ 的值吗？
查看完整题目与答案
【多选题】下列哪些是该回路的组成元件()。
A.
油泵
B.
三位四通电磁换向阀（y型）
C.
两位四通电磁换向阀
D.
压力继电器
E.
溢流阀
F.
单作用缸
查看完整题目与答案
【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
查看完整题目与答案
【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．
查看完整题目与答案
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