Our teacher told us that light ______ faster than sound.
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Don't put off till tomorrow ________ you should do today!
1年前
我国某部宪法将国家性质表述为:“工人阶级领导的,以工农联盟为基础的人民民主国家。”这一表述说明当时 [ ]
1年前
在△ABC中,角A,B,C的对边分别为a,b,c,已知B=60°,cos(B+C)=- 11/ 14 . (1)求cosC的值; (2)若bcosC+acosB=5,求△ABC的面积.
1年前
I wonder how many ______ (手术) ORBIS doctors perform during their visit to a poor country.
1年前
1年前