选择题：7._____, he would not have recovered so quickly.　(

题目内容：
7.
_____, he would not have recovered so quickly.　
(A) Had’t he been taken good care of
(B) Had he not been taken good care of
(C) Had not he been taken good care of
(D) Had he been not taken good care of
参考答案：

AB和BC两段导线，其长均为10cm，在B处相接成30°角，若使导线在均匀磁场中以速度V=1.5m/

AB和BC两段导线，其长均为10cm，在B处相接成30°角，若使导线在均匀磁场中以速度V=1.5m/s运动，方向如图，磁场方向垂直纸面向里，磁感应强度，问A、C

分类：郑州工程技术学院-大学英语（2）.  题型：选择题
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