变压器低压绕组比高压组的导线直径()。
A.粗
B.细
C.相同
D.无法确定
参考答案:A
教育改革的核心是______.
A.内容改革 B.方法改革C.课程改革 D.途径改革
John came up_____ his English teacher and asked her a question.[ ]
A. to
B. from
C. of
D. on