Two balls and a string: from ordered motion to chaosORBITAL DYNAMICSTwo spherical balls are connected by a taught string passing through a small hole in a perfectly planar table: the first ball, subject to a central force, moves without friction on a two-dimensional plane, while the second ...
The health percussion device composed of two balls fixed on a long string is composed of a hammer block with certain weight, a soft rope and a handle which are connected together. A jacket layer which is provided with a plurality of elastic bulges is sheathed on the outer part of the ...
百度试题 结果1 题目2. There are two balls in the bag. A.包里有两个球。 B.这里有一个包和两个球。 相关知识点: 试题来源: 解析 2.A 反馈 收藏
根据中文补全短语或句子。1. twoballs(两个小球)2.agirl(一个高个子女孩)3. fourapples(四个大苹果)4.aruler(一把长尺子)5. Mu
()5. What's that two balls? A. between B.on C.in(.)6.ther e any pcople th e moon?.19.8 A. Is, on B. Are, on C. Are, fu+.()7. W e can'se e th e sun th e day, and w e can se e th e moon广night A.in,at二●0 B. in. on C. on, at,天4A)8. ...
百度试题 结果1 题目 ()1. Jane two balls. A. have B. has C. is第 1 小题句意为“Jane 有两个球”,所以不能选 be 动词 is;Jane 是第三人称单数,要用has,因此答案为B。 相关知识点: 试题来源: 解析 反馈 收藏
百度试题 结果1 题目D. Detween C. on)2.There two balls. A.be B.is C.ars 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
Example: two balls / on the floorThere are two balls on the floor.1. a wardrobe / near the bedThere is a wardrob near the bed.2. some books / in the schoolbagThere are some books in the schoolbag3. a computer / on the deskThereisacomputer'OHthedeSk.4. three trees / behind the ...
比如第一句吧，a pen是单数，所以be动词用is。如果two balls放在前面，把a pen放到后面，那么be动词就要用are，即There are two balls and a pen.第二句，这是一个特殊疑问句，疑问词where放置句首。因为句子的主语是复数，即the mother和her babies，所以be动词要用are.如果单单问你the mother，...
two balls and a ping-pong bat是动词has的宾语,指事物。对事物进行提问用特殊疑问词what,后接一般疑问句形式,即助动词/情态动词/系动词+主语+谓语动词原形+其他。句中用实义动词has,对应原形是have,主语John是第三人称单数,所以用助动词does引导一般疑问句。所以答案是:What does;have。