皮皮学，免费搜题
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【多选题】
大气运动基本：A.
气压梯度力
B.
地心引力
C.
摩擦力
D.
地转偏向力
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】老子的代表作是什么？
【单选题】---Youshould have prepared your speech for the meeting, Mr. Smith. ---Yes, I know. But how could I _____ the meeting date fixed so soon.
A.
while
B.
as
C.
after
D.
with
【简答题】You have heard of Webster Toys. Webster has made good, safe, interesting toys for more than 100 years. Now we sell them, and children play with them, in countries from New Zealand to Norway, and from ...
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