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10. He wondered if he could slip out of the lecture hall without anyone _________.(A) noticing
問題詳情
10. He wondered if he could slip out of the lecture hall without anyone _________.
(A) noticing
(B) noticed
(C) to notice
(D) being noticed
參考答案
答案:A
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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18.一水平抛出的小球落到一倾角为的斜面上时,其速度方向与斜面垂直,运动轨迹如右图中虚线所示。小球在竖直方向下落的距离与在水平方向通过的距离之比为
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15. 某物体左右两侧各有一竖直放置的平面镜,两平面镜相互平行,物体距离左镜4m,右镜8m,如图所示,物体在左镜所成的像中从右向左数的第三个像与物体的距离是 (A)24m (B)32m (C)40
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