worthwhile和worthy别: worthwhile 形式1: 动名词/式be worthwhile explaining a job fully to a new employee ** worthwhile. to explain a job fully to a new employee ** worthwhile. 给新雇员详细说明工作的要求是值。 形式 2: it ** + worthwhile + 动名词/不定式 for example: it ** worthwhile to explain a job fully to a new employee. it ** worthwhile explaining a job fully to a new employee. 形式3: it ** worth one’s while + 不定式 (不加动名词) it ** worth your while to explain a job fully to a new employee. worthy 形式 1: be worthy of 名词/动名词的被动形式(不加不定式) th** **sue ** worthy of careful study. 这一问题值得仔细研究。 th** **sue ** worthy of being studied carefully. (passive gerund) 形式 2: be worthy + 不定式的被动形式 for example: the **sue ** worthy to be studied carefully. 20210311
bd=bc + cd = bc - dc的向量加减: 相加时:向量的终点要和个响亮的起点一样,最后结果一量的起点到第二个向量的终点.比如mn+np=mp ,nm+pn=pm 相减时:两个向量的起点要一样,最后结果就是:减号后面的向量的终点点到减号前面向量的终点.比如mn-mp=pn ,nm - np=pm 例如这一题:(有两种方法) ① 加法:bd=bc + cd = bc - dc ②...
fbi的是调查违反联邦犯罪法,支持法律。保国调查来自于外国报和恐怖活动领导阶层和法律执行方面对联邦,州,当地和国际机构提供帮助,同时在响应公众需要和忠实于美国宪法前提下履行职责。对内,全权负责维护**安全和防范有组织的**活动;对外,积极协助美国**军事情报局(m.i.a., military intelligence agency, u.s. department of defense) 及美国...