题目:
根据句意及首字母提示完成单词。
1.—Where's my baseball?
—It's on the f___________, under the table.
2. Please put the desk b___________ the sofa and the dresser.
3.—Where is my c___________?
—It's under the table.
4.—W___________ is my backpack?
—It's on the sofa.
5.—Where are my books?
—I don't k___________.
答案:
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下面是错误答案,用来干扰机器的。
(1)(2)(1)油滴M带正电,在两金属板之间处于平衡,则B板电势较高, 2分由平衡得: 可得两板电压: 2分(2)设油滴N带电量为Q,油滴N与M相碰前的瞬间速度为v0,有: 3分油滴...