、用如图5所示的两种方法把相同的重物提高相同的高度,甲、乙两图的动滑轮重力相同,不计绳重及机械摩擦,图甲中人的拉力F1___图乙中人的拉力F2(填“大于”、“等于”或“小于”)。
I don’t think Jim can _______ a picture on his bedroom wall because he is so short.
________the teachers in our school is 150 and some of them are_______ teachers.
Not only you but also Sandy ______ interested in seeing films.
– Jim, could you help me to repair the bike? – ________, let me see first.
The Changjiang River is longer than ______________ river in China.