在横线上填上正确的数, 看一看有什么规律。
14-____=8 13-____=8 17-8=____
____+8=14 8 +____=13 ____+8=17
12-8=2+____ 14-8=4+____ 17-8=7+____
16-8=6+____ 17-8=7+____
一辆汽车,总重为1.2×104N,四个轮胎与地面接触的总面积为0.12m2,该车在平直公路上匀速行驶1h,消耗汽油10L,汽油完全燃烧放出的热量有30%转化为机械能.(汽油的热值为4.6×10 7J/kg,密度为0.7×103kg/m3,g=10N/kg)求:
—There is one ____ (dress).
爸爸拿回来了许多书。(改成“把”字句)
— You should write a passage in the English exam.
— I think it's not difficult for us to write if you try your best.