一道语法题? Cary didn't go to the party last night because she ____ the baby for her sister until 9:30. (A) must have looked after (B) would have to look after (C) had to look after (D) should have looked after 正确答案是C (B)是过去将来时,表示“过去将不得不照顾孩子”,为什么不对?过去将来时一般 用在什么情况下?查看更多1个回答 . 3人已关注
编译Fortran代码时出现错误和警告? 各位大侠,我在练习《Aspen plus getting started customizing unit operation models》中的例子putting the models equations in the user subroutine 时,按照书上的代码编写,但是在编译的时候弹出如下错误,请问该如何解决。我已经检查过了,提示中133行的那个MW,书上给的代码里,确实没有定义,所以是书上代码错误了吗?还请各位高手指教,急!谢谢大家! 查看更多1个回答 . 3人已关注