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- 1对 once a week never for an hour three times ever
- 2蜜蜂每秒飞行6.7米,比蜻蜓飞行的速度慢33%.蜻蜓每秒飞多少米?
- 3初中物理简单机械那得所有计算公式
- 4It was not until __ that __ to prepare his lessons.
- 5一个长方体形状的玻璃容器,长40cm,宽30cm,高50cm,容器内装满水.现把这些水全部倒入另一个长60cm,宽40cm
- 6用influence\absent\fail造句
- 7They all say the weather report ___ ___ correct.A.are not always B.is not always C.always is not
- 8english is a language as difficult as chinese 和 english is as difficult a language as chinese 都行
- 9现有秒表,一条长绳(2m).在长绳一端系一个小铁块就做成了“单摆”.将绳拉紧,在竖直面内把小铁块拉到一定高度(长绳与竖直方向夹角小于5度)自由释放,测出它摆动一个来回所用时间.怎样能测得更准确?改变哪些因素可以改变摆摆动一次的时间?据此猜测
- 10根据规律填数 2分之1,17分之1 ()()