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_____ I've known him for a long time, _______I don't know him well.a. / … although b. Though … but c. Though … yet d. because … They take a bus to school every day.（改为一般疑问句） Ann goes to violin lessons （on friday）提问 关于英语语法中名词所有格的用法为什么是twenty dollar 's value 而不是twenty dollars' value 不要让距离变得遥远的英语怎么说 人体中的杠杆有哪些?人体中的杠杆有好多,它们能够协调和支配力量的分布,完成某一个动作或任务.关键拒绝与力点与支点的距离,力点与重点的距离,距离大小决定着用力的大小,有时候省力, 杠杆平衡时,动力和阻力的方向一定相反,这为什么不对呢?就算是180°旋转,一个是顺时针,一个是逆时针,方向不还是相反的吗? 谁知道指甲钳的结构吖?A一个省力杠杆 B一个省力杠杆、一个费力杠杆 C一个省力杠杆、两个费力杠杆 D两个省力杠杆、一个费力杠杆 最好有图能说明三个杠杆的位置~不过能说明白就行... 高杠杆基金都有哪些?杠杆率分别都是多少? 杠杆有什么作用 We often (visit our grandparents) on weekends(对括号内提问 I often visit the w___ on my computer on weekends. i often visit my grandparents on the weekend(对划线部分提问)（画线部分为on the weekend） We sometimes go to visit my grandparents on weekends对画线部分提问 ------------ 高中同学录怎么写留言我们高一读完了 马上要分班了 同学录的留言该怎么写呢 写的现实点的东西 她知道我语文水平不好的...至少100左右吧 哈哈! mary together with her monther parents often _ to the movies at weekends选C A.go B.is going C.goesD.are going Her parents ( )to the movies on weekends.A.often B.often see C.often go D,often watch 是不是所有杠杆的3个点都一定在一条直线上? 杠杆可以是直的,也可以是弯曲的? 谁来解释下,费力杠杆有什么有点?费力杠杆的优点是省距离,这我知道,但是光这个说,有点笼统,难以理解.谁能具体说明下,或者举一个实例比如说古代的投石机，为什么要制成一个费力杠杆？ be in charge of等于什么 in charge of 和be in charge of有什么不同用法? be in charge I often visit grandparents on the weekend?改I often visit grandparents on the weekend?改为一般疑问句 I visit my grandparents last weekend.改为一般疑问句.一定要正确 They often visit grandparents on the weekend.(visit要加S吗) he often---- (visit) his grandparents on the weekend 用动词的正确形式 I like to spend some time___English in the morning. A.read B.to read C.on reading D.reading Mary visited (her grandparents) last Sunday.对括号里的提问 Mary visitde her grandparents last Sunday(对划线部分提问)快 Mary ____________ (visit) her grandparents tomorrow. 17.Mary( )(visit) her grandparents tomorrow. 以My best friend的短文Tim,America,in the same school,in different classes,tall,like,like singing football,teach English,teach chinese,help each other,after school,do homework togetherl里面要有的