求一道首字母填空~
题目
求一道首字母填空~
Liu Xiang withdrew from the Olympic Games in 2008.After an operation he returned to training in July.Lix and his coach both hoped the Shanghai Golden Grand Prix would help him i_____
答案
填improve,意为“改善”,楼上是错的,不用ing形式,help sb do sth
补充:help sb do sth=help sb to do sth
(不过常用的是原型)
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
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