1.让氦核（4 2 He） ,氚核（2 1 H） 的混合物沿着与电场垂直的方向进入匀强电场偏转,要使它们最后偏转角相同,这些粒子必须有相同的（ ）A.B.动能 C.电量 D.质量老师讲过速度tan的公式 是 tan=UQ

英语翻译1.He sat in the dark( )( )he couldnt( )( ） 2．（ ）（ ）（ ）was（ he got to the railway station on time． 3He(质子数为2,质量数为3的He原子）与4He是不是同素异形体,为什么?说具体点 （1）So carelessly _____ that he almost killed himself.A.he drives B.does he drive C.did he drive D.he drove（2）Not only _____ a promise,but also he kept it.A.did he make B.he made C.does he make D.has he made选哪个答案,为什么? 英语翻译他离家已经两年了.（4种）He ___________________________ home for 2 years.2 years ______________ since he _____ home.It ________ 2 years since he ______ home.He _______ home 2 years _____. 按括号内的内容提问：1、(He) has a purple sofa.2、He has a （purple） sofa.3、He has （a purple sofa).4、The racket is (mine).5、(He) often does his homework at home.6、He (often) does his homework at home.7、He often (does his hom he didn't stop until he came to the top同义句两句.1、（ ）（ ）he came to the top did he stop.2、( ） ( ）( )he came to the top that he stopped.空格里面一个词。 he never eats out.同义句请回答2个1.He never------ -------- -------- --------2.He------- -------- -------- -------.3q He is a teacher划线提问a teacher （1）----- ----- he ------?（2）----- is he?我非常急 快 He seems very nice同义句（1）He seems( ) ( )very nice. (2) ( )( )( )he is very nice. 英语翻译1：he's always late 2：He always late --------------------3：he's often late 4：he often late第三个呢? he never does what he is told 把HE换成HIM行不行第2个HE 唱和的和有2个读音：he 是2声 he是4声 急 肯定/否定反义疑问句的回答的区别 he is a man,isn't he?[1] yes, he is.[2] no, he isn't.he isn't a man, is he?[3] yes, he is.[4] no, he isn't.1,2,3,4句翻译一下,让我对比对比,谢谢 高中英语强调性语句题1:It was not until( )back that( ) NOT until( )back( )A:he came,he left B:came he,he left C;he came,did he leave D:did he come,he left (第一句和第二句分别选A和C）2：while shopping ,we can't 3、填写副词 1）She is sad, she cries _________. 2）Peter is heavy, he moves ________. 3）He is a q3、填写副词 1）She is sad, she cries _________. 2）Peter is heavy, he moves ________. 3）He is a quick learner, he learns ________. 4） Jack is an English boy.He wants to have friendJack is an English boy.He wants to have friend in China.He hes a healthy eating（1 ）He like fruit and vegetbles.（2）are his fruir salad （3）dinner.He doesn't eat（4） go for it七下u9 2b 求求你们啦）：1.what does Sally like?2.Does he have curly?3.What does Sally‘s like?文章是：Conversation1Is that your brother David?No,it isn't.What does David look like?Is he short or tall?He's tall.He's heavy.And he 直接引语变间接引语（1）“it is my turn now,”tom said.→ tom said（）（2）“i will do it tomorrowhe said.→ he said ( ) (3)he said,i went to the park yesterday. → he said(that)he had gone to the park ( ) (4)the manager said,