arccosx的导数是什么

The teacher said,‘ H__ in your exercise books before the class is over ’ What letter stands for sea?(谜语）谢谢啦! Do Exercise 3 on your exercise-books.这句话哪有错 “What letter stands for sea?”的中文意思帮帮我 谜语What letter stands for sea? did you eat your words,Billy?Sorry,dear.But I really forgot where I was ___ to选项:a、demanded b、imagined c、supposed d、guessed Why do you use your mouth eat rice? Did you eat your dinner中eat的正确形式是什么 英语翻译不要机译 you must remember----------.a.what your teacher said B.what did your teacher sayC,your teacher said what D what has your teacher said Your must remember_____.a.what your teacher said b.what did your teacher say还有两个选项：c.your teacher said what d.what has your teacher said 36.You must remember what your teacher said.(改为否定句) the internet is becoming more and more p-–––– with the people around the world let us put it this way let me put it this Let me put it this way （这样说吧） 为什么不用“in this way”? When will the train get to the next (r ) station? These snakes are his.(用TOM和KARL改为选择疑问句)______these snacks _______ _______ ______? The poor man had no choice but beg from door to door.改错! the poor child had to --- food from door to door A.ask for B.beg C.ask D.beg for Are they in the door? English is ___ used by more and more people.(wide) Remember how your parents always told you to eat your broccoli.这篇首字母 I eat lots of broccoli lapples的汉语意思是什么 The big fire was put out in the end,___ great damage to the village.答案给的怎么是 having caused,而没有选 causing the fire broke during the night 大火发生在夜间.broke 词典里找不到＞＜ the fire that broke out in the plant during the night ...怎么翻译the fire that broke out in the plant during the night ... 怎么翻译 I braced myself as she got out of bed and came to the door.It was time she had set aside...I braced myself as she got out of bed and came to the door.It was time she had set aside each day to wallow a little in private.I going straight for the stash The teacher ____ have thought John was worth it or she wouldn't have wasted time on him.A.should B.can C.would D.must我知道B肯定不对的,然后我觉得A代进去更加通顺,为什么不选A呢? Are ( ) your books?----No,They ( ) ( ).They ( ) Tom is. 填入合适的代词 1Are these your books?Yes,they are .2 Tom's sister is a nurse.hat is white. dollars是什么意思There ____(is some dollars / are some dollars ) on the table .