题目

下列各图能正确反映两个等量正电荷连线中垂线（图中x轴）上各点电势的分布图是  答案：B— You were really brave to save the drowning boy from the river. — Anybody else ______ that under the same circumstances. [     ]A. would have doneB. would doC. must have doneD. had done