题型:问答题 简答题 Hello, my name is Jack. I 21 a student in No.1 Middle school. In my spare time(空余时间), I like doing sports .I like 22 tennis and basketball.Look 23 my bedroom. I have a tennis racket. 24 is on the table. I have two 25 . They are 26 the bed. Playing sports is very 27 , so I like it very much. I also like eating. Among(在……中间)fruits, I like 28 best. But I 29 like vegetables. I like French fries very much. So I am very fat. The doctor asks me to eat more 30 food.小题1:A.isB.areC.amD.do小题2:A.theB.aC./D.an小题3:A.atB.inC.forD.to小题4:A.ItB.ItsC.TheyD.Them小题5:A.basketballsB.basketball C.volleyballD.soccer小题6:A.inB.atC.toD.under小题7:A.boring B.funC.wellD.bad小题8:A.carrotsB.ice creamC.broccoli D.bananas小题9:A.doB.don’tC.doesD.doesn’t小题10:A.relaxingB.healthyC.badD.health 查看答案
题型:问答题 简答题 关于胶体金免疫技术基本原理的描述,不正确的是()A.氯金酸在还原剂作用下,可聚合成金颗粒,形成带负电的疏水胶溶液B.定性或半定量的快速免疫检测方法中,胶体金也可以进一步通过银颗粒的沉积被放大,称之为免疫金银染色C.胶体金是一定大小的带负电荷的金颗粒,通过静电作用而形成的稳定的胶体D.用还原法可以方便地从氯金酸制备各种不同粒径胶体金颗粒E.胶体金颗粒很容易同各种蛋白质共价结合 查看答案
题型:问答题 简答题 下边漫画《对比》说明[ ]①我国一些人的生育观念有待提高②我们必须实施计划生育国策,控制人口数量,提高人口素质③严峻的人口形势,影响了我国居民生活水平的提高④中国交通运输不发达A.①②③B.①②C.①③D.①②③④ 查看答案
题型:问答题 简答题 如图所示,理想变压器原、副线圈的匝数比为10:1,b是原线圈的中心接头,电压表V和电流表A均为理想电表.从某时刻开始在原线圈c、d两端加上交变电压,其瞬时值表达式为u=220sin100πt(V).下列说法正确的是( )A.当单刀双掷开关与a连接时,电压表的示数为22VB.当单刀双掷开关与b连接时,电压表的示数为11VC.当单刀双掷开关与a连接,滑动变阻器触头P向上移动的过程中,电压表的示数不变,电流表的示数变大D.单刀掷开关由a扳向b时(滑动变阻器触头P不动),电压表和电流表的示数均变大 查看答案