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单选题 He made a ______ to pay the rent on time
学科：默认课程
时间：2025-11-23 13:51:11
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题目1判断题
满足<img src="https://tihai-oss-cloud.itihey.com/img/7bf9f5cb5569253233ec807bbd1ec0d9.png">的面积上的磁感应强度都为零A. 正确B. 错误
题目2判断题
磁通量是矢量,正负仅表示其方向A. 正确B. 错误
题目3判断题
由于磁感应线是无始无终的闭合线,所以通过任意闭合曲面S的磁通量恒等于0A. 正确B. 错误
题目4单选题
均匀磁场的磁感强度垂直于半径为r的圆面.今以该圆周为边线,作一半球面S,则通过S面的磁通量的大小为A. <img src="https://tihai-oss-cloud.itihey.com/img/60b9ead6e3512d677ccd85da58a178c3.webp">B. πr2BC. 0D. 无法确定的量
题目5单选题
下列关于磁通量的说法正确的是A. 面积大,磁通量一定大B. 磁感应强度大,磁通量一定大C. 磁感应强度大,面积大,则磁通量一定大D. 磁感应强度大,面积大,而磁通量不一定大
题目6单选题
如图,正方形线圈abcd的一半处于匀强磁场中,线圈平面与磁场方向垂直.在线圈以ab为轴转动90°的过程中,穿过线圈的磁通量大小 <img src="https://tihai-oss-cloud.itihey.com/img/d72f40af8c8a36e0b07f1cce5f43c13f.png">A. 一直减小B. 先增大后减小C. 先减小后增大D. 先不变后减小
题目7单选题
The starting salary was not great, but his career ______ were goodA. prospectB. prospectsC. prosperousD. prosperously
题目8单选题
He made a ______ to pay the rent on timeA. commitB. committedC. committingD. commitment
题目9单选题
Your volunteer work might also introduce you to professional organizations that could be of ______ to your careerA. benefitB. benefitsC. beneficialD. benefaction
题目10单选题
All applicants over the age of eighteen are eligible for active ______A. memberB. membersC. membershipD. memberships
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