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【判断题】
水平井被认为是20世纪80年代石油工业勘探开发技术重要的发展之一。国内大部分油田20世纪90年代开始采用水平井完井技术,从而大同幅度提高油气勘探、开发的社会效益和经济效益。()
A.
正确
B.
错误
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举一反三
【单选题】下面关于电位的描述错误的是( )
A.
电场强度由低电位面指向高电位面
B.
零电位参考点可以任意选择
C.
两点之间的电位差与零电位参考点的选择无关
D.
电场强度的方向与等电位面垂直
【简答题】The Short Board 短板 Write an essay of 160-200 words based on the drawing. In your essay, you should 1)describe the drawing briefly, 2)explain its intended meaning, and 3)give your comments.
【简答题】A.An essay, B.A magazine article C.A poem. D.A short story.
【单选题】下面关于参考方向描述错误的是( )。
A.
任意定义的方向
B.
从电源正极指向负极
C.
当测量结果为正时和实际方向相同
D.
当测量结果为负时,与实际方向相反
【单选题】The first time I saw him, what impressed me most were his waistline _____ nearly 3 Chinese chi and his obesity ______ 210 jin.
A.
measured ; weighed
B.
measuring; weighing
C.
measured; weighing
D.
measuring; weighed
【判断题】距现在的考古证明发现人类第一次艺术创造大概在欧洲和亚洲的冰河期晚期。()
A.
正确
B.
错误
【单选题】下面关于基尔霍夫电压定律运用描述错误的是( )
A.
KVL规定了电路中任一回路内电压必须服从的约束关系
B.
应用KVL电压方程时,首先要选取回路绕行方向
C.
凡电压的参考方向和回路绕行方向一致时电压取负值
D.
KVL还可以应用于任一不闭合的电路
【单选题】A. It costs much less C. Most old people like it B. It saves time D. Most young people like it
A.
It costs much less
B.
It saves time
C.
Most old people like it
D.
Most young people like it
【简答题】Directions: For this part, you are allowed 30 minutes to write a short essay on innovation. Your essay should include the importance of innovation and measures to be taken to encourage innovation. You...
【简答题】【题目】 Directions: For this part, you are allowed 30 minutes to write a short essay on invention. Your essay should include the importance of invention and measures to be taken to encourage invention.Yo...
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