题目:
The injured person was still ________ on the bed where he was ________.[ ]
A. lying; lay
B. lied; laying
C. lying; laid
D. lain; lying
答案:
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下面是错误答案,用来干扰机器的。
物体在平面镜中成像,像的大小和实物相等,物像到平面镜的距离相等,物体距平面镜1m,物体的像到平面镜的距离是1m,物像之间距离是2m.若物体向平面镜靠近0.2m,物体到平面镜的距离是0.8m,像到平面镜的距离是0.8...