问题
选择题
When ______from the hill, the buses look small.[ ]
A. seen
B. seeing
C. see
D. to see
答案
答案：A
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When ______from the hill, the buses look small.[ ]
A. seen
B. seeing
C. see
D. to see
答案：A
，
，重力加速度为g）（本小题8分）