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- 2甲从A地到B地要走m h，乙从B地到A地要走n h，若甲、乙二人同时从A，B两地出发，经过几小时相遇？_．
- 3Hurry up or you can't catch the early bus .同义句Hurry up or you ____ ____the early bus.
- 4在锐角三角形ABC中,边a,b是方程x^2-2根号3x+2=0的两根,角A,B满足2Sin(A+B)-根号3=0,则边c长为
- 5Be careful,or you will get i＿＿＿
- 6一个三位数,它含有因数2,又含有因数5,百位上是最小的质数,十位上是最小的奇数,这个数是几?
- 7含碘元素20mg的碘酸钾质量是多少克
- 8北京时间4点25分时,钟表上时针与分针所形成的角的度数为_______度
- 91.Where does the rain come from?2.Where does the cloud come from?3.Where does the vapour come from?
- 10美国地形东部为低矮的____,中部为____,西部有高大的___山系组成,面积居世界第___位?