...e 2, showed a BSFC penalty of about 1.8% per 10 kPa back pressure increase when back pressure exceeded the back pressure limit for this engine.这里的per是不是就相当于 for every? 这句话证明per后面也可以跟不是“每一”的情况?谢谢老师!
...们在圣诞节时交换礼物。若交换的对象为不可数名词,则只能用单数。如:The
meetings provided an opportunity to exchange information. 这些会议提供了交流信息的机会。偶尔也接单数可数名词,但比较少见。如:Trevor and I exchanged a
glance. 特...
When she was that little girl in Pennsylvania,Rachel Carson never would have believed that years later she would write a scientific book that would stir up so much controversy. never的位置可以在情态动词前吗?这样是强调的用法吗? 在情态动词后是不是也可以...
... had a united command.“neither… nor…”用于连接两个性质相同的词或短语。但是在这个句子中“were neither united nor had …”可以这样用吗?同样的有一句话:Well over 90 percent of U.S. households are either wired for high-speed broadband or can get high-spe...
...系分句中,it为先行主语,that each should give us_为外置主语从句,我的疑问是,外置主语从句中give的直接宾语是what呢?还是融合型关系代词what拆分后的融合型结构the thing which中的关系代词which呢?(1) It is right that each should give us wh...