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- 1标准状况下,v升 HCL气体溶于一升水中.所得溶液密度为p g/moL (1)所得溶液中溶质的物质的量为
- 2对划线部分提问:The old man is( on the sofa)
- 3望远镜 阅读短文中模模糊糊,很难看清楚,看明白的词语是什么
- 4改错:1.What are their job?They are teachers.2.Where are your shoes?It's under the bed.怎么改
- 5计算:1—2+3—4+5—6…—100+101=(
- 6Ted worked like a horse in his youth,______contributed to his great success
- 7we are happy to receive our parents' letter (同义句)we are happy to _____ ______ our ________
- 8计算:(3+1/3)(3^2+1/3^2)(3^4+1/3^4)(3^8+1/3^8) (3^16+1/3^16)
- 9如图所示,跳伞运动员和伞在空中匀速直线下降,已知人和伞的总重为750N,则人和伞受到的阻力大小为_N,方向是_.
- 10已知函数f(x)=ax2+bx3的图像经过点M(1,4),曲线在点M处的切线恰好与直线x+9y=0垂直.