watch的用法与例句

被积式f(x)dx怎么理解, d/dx∫（a b）f(t-x)dt 前面的d/dx是什么意思? Do you know your new teacher quite well?改同义句请改同义句 over the nest 100 years这个句出现时有没有时态的要求?in/over the last 100 years用现在完成时 Over thirty years ago he left his hometown .Over 可以换成什么 Nothing is more important tha n our time over 100 years前面的动词时态为? 句型转换 1.what about playing basketball after school2.diving is the most difficult activity of all3.both Lucy and Lily like learning Chinese our company ____ a 50% increase in production this year.A.on the basis of B.apply for C.aim at The（ ）production of engines in our factory has doubled this year.A.manualB.annualC.amountD.alike Our company brought this building, that the boy violin play can well chess well 造句 His father cames back over sixty years ago.同义句 什么是脸上三角反射区 roll in the deep的中文歌词 1.林叔叔用铁皮加工10个长0.8m,宽0.5m高5m的长方体烟囱,用了多少平方米的铁皮?2.用一张长40cm,宽20cm的长方形铁皮,加工一个深5cm的长方体铁皮盒,（焊接处与铁皮厚度不计）,这个长方体铁皮盒的 一个圆柱形铁皮烟囱,底面周长是2.5m,如果将烟囱加高到32m,至少还要铁皮多少米? The student skipping classes left the classroom without___.（notice）这个逃课的学生离开了教室,没有人注意到 The students 什么going home The meeting being over,all of us went home为什么事 being over? The meeting being over, all of us went home. 开完会后我们都回家了为什么用being the meeting being over,all of us went home. 和when the meeting was over ,~ 为什么用being和was How about playing basketball的回答句子 是英文的 How about playing basketball? Should any of the items be of interest to you,please let us know as soon as possible.这是一句倒装句,正常的语序是什么? The boy goes to bed at nine 对at nine 提问 in several years用什么时态 was和were的用法There is a car race near our town every.In 1995,（there was a very big race.）书上说was是对应第一人称和第三人称单数,其他情况用were,上文括号中的部分并没有出现人称,为什么用was? Can he goes with us (改错) having+ved 如:having stood for many years 是什么时态?还是什么用法?是什么时态还是什么用法?有人说是完成进行时 不过完成进行是是have+ving was的用法.were的用法 spring comes befoe summer