下列关于分子、原子的说法错误的是( ) A.分子是构成物质的一种粒子 B.原子是 发布时间:2017-04-27 10:28 │ 来源:www.tikuol.com 题型:选择题 问题: 下列关于分子、原子的说法错误的是( )A.分子是构成物质的一种粒子B.原子是化学变化中的最小粒子C.分子都是由两个原子构成的D.原子是由原子核和核外电子构成的
题型:选择题 完形填空阅读下面短文,理解大意,然后从各小题的四个选项中,选出一个最佳答案,使短文连贯完整。During the weekend, I usually like to __1__at home, but sometimes I like to go out for a walk 2 play football. My friend Jack works hard__3__ the week. At the weekend, he always goes to__4 his uncle and aunt work on their farm with his family.The__5__is not very big, but there is always so much to_6__ on a farm. The children look__7__ the animals and give them food. Jack and his wife help them work_8__ the fields (田野). At the end of the day, they are all___9__ and tired. After Jack’s aunt_ 10__ them a big meal, they go back home in a car.小题1:A.keepB.stayC. sitD.stand小题2:A.orB.butC. andD.also小题3:A.onB.toC.duringD.for小题4:A.make B.wait for C. findD.help小题5:A.farmB.shopC. house D.car小题6:A.seeB.doC. makeD.help小题7:A.atB.forC.afterD.up小题8:A.ofB.atC. with D.in小题9:A.hungry B. interested C.excitedD.angry小题10:A.carriedB.givesC. passesD. spends 查看答案
题型:选择题 下面说法中,错误的是______。A.文本型字段,最长为 255 个字符 B.要得到一个计算字段的结果,仅能运用总计查询来完成 C.在创建一对一关系时,要求两个表的相关字段都是主关键字 D.创建表之间的关系时,正确的操作是关闭所有打开的表 查看答案