Which of the following is right?A.Could you tell me when he has been away?
题目
Which of the following is right?A.Could you tell me when he has been away?
B.There many students want to take part in the school sports meeting
c.I hope you to come here again.
D.We were told that sound travels through air.
请教哪个是正确的,错的错在哪里?
答案
正确的应是D.A.Could you tell me when he has been away?中when(指的是时间点)和完成时态不一起用,可改成Could you tell me when he left?或Could you tell me how long he has been away?B.There many students wa...
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
热门考点
- 求5道七年级上数学普通计算题(最好带负数),5道一元一次方程,5道化简求值题,急用,跪求!
- 写出和下面诗句有关的地名或建筑物的名称
- 比A的倒数大6的数是.
- 用方程解答:一桶油,油和桶共重120千克,油的质量是空桶的5倍,这个油桶里装了多少千克油?
- 电解池中,为什么电子是由阳极流向阴极的?
- 工程热力学里的流动功怎么理解啊,还有就是稳定流动的能量方程式说的是开口系的能量平衡还是质量为m的能量
- wind-induced是什么意思
- 用多种方法鉴别粉末状的Na2CO3和SiO2
- 一车最多载30t 容积40M^3 运钢材和木材,钢密度7.9G/CM^3 木材0.5G/CM^3,要如何搭配能充分利用
- 已知a-2b=5,则a^2-2ab-10b=?若a+b=3,则ab+(a^2+b^2)/2=?若4x^2+4xy+2y^2+6y+9=0,则x-y=?