问题
选择题
甲、乙两车相向运动,碰撞后连成一体并沿甲车的原方向运动,由此可判断
A.乙车的质量比甲车的小
B.乙车的速度比甲车的小
C.乙车的动量比甲车的小
D.乙对甲的作用力小于甲对乙的作用力
答案
答案:C
甲、乙两车相向运动,碰撞后连成一体并沿甲车的原方向运动,由此可判断
A.乙车的质量比甲车的小
B.乙车的速度比甲车的小
C.乙车的动量比甲车的小
D.乙对甲的作用力小于甲对乙的作用力
答案:C
完形填空。 | |||
Hello, My name is Wang Li. I was born 1 May 15th, 1994. Today is my fourteenth 2 . My friends want to have a birthday party for me. We 3 celebrate it in my home this evening. Jack gives me a long box, and there is an umbrella in it. 4 is it? It's my favorite-green. Lucy gives me a 5 box, and the box is like a ball. At first I think it is a large cake in it, but it is a 6 basketball. Lucy bought it just now. I like 7 basketball very much. So I often play basketball 8 my classmates. My father also buys something 9 me. It's a PC (个人电脑). My father says I can use the PC 10 English. I am very happy today. | |||
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