We all write () ,even there's not much to say.Anow and thenB by and byC step by stepD more or less到底选A还是选D呢？这句话应怎样翻译？

1、（）at all is worth doing well.A Whatever is worth doingB That is worth doing这里的at all怎么这么绕口啊，这句话应如何翻译呢？2、The teacher told us that ()A well begun was half doneB well begining is half done这里应该使用名词吧，为什么答案是A呢？3 The doctor asked her( ...

在△ABC中,D是BC中点,已知∠BAD+∠C=90°,试判断△ABC的形状？

数学必修5第一章在△ABC中,D是BC中点,已知∠BAD+∠C=90°,试判断△ABC的形状？

等物质的量的下列有机物在中充分燃烧，消耗 氧气最多的是()A．乙醛B．乙醇C．乙二醇D．甲酸甲酯