问题
不定项选择
质量m=100 kg的小船静止在平静水面上，船两端载着m甲=40 kg，m乙=60 kg的游泳者，在同一水平线上甲向左乙向右同时以相对于岸3 m/s的速度跃入水中，如图所示，则小船的运动方向和速率为
A．0.6 m/s，向左
B．3 m/s，向左
C．0.6 m/s，向右
D．3m/s，向右
答案
答案：A
搜题请搜索小程序“爱下问搜题”
质量m=100 kg的小船静止在平静水面上，船两端载着m甲=40 kg，m乙=60 kg的游泳者，在同一水平线上甲向左乙向右同时以相对于岸3 m/s的速度跃入水中，如图所示，则小船的运动方向和速率为
A．0.6 m/s，向左
B．3 m/s，向左
C．0.6 m/s，向右
D．3m/s，向右
答案：A
He is a 16-year-old boy. __1__name is Alan Brown. Alan is __2__ American high school student. He lives at __3__ Road. Art and music __4__ his favourite subjects. He loves studying and also loves sports. He usually goes swimming three or four times every week. And he walks after supper every _5__. Cool water and clean air always make him happy. American students are quite different from __6__. On Saturdays, he often has parties __7__ his friends and they always enjoy themselves. On Sundays, he usually __8__ at home and watches TV.
|