废旧手机的某些部件中含有 M g 、 A l 、 C u 、 A g 等金属,为了回收重金属,将旧手机的部件粉碎并浸入足量稀硫酸中充分反应过滤,所得固体中含有的金属是()
词典是我们学习的好帮手,一般来说,下列哪个单词在英语词典中排在最前面。 A.fan B.floor C.light
选出每组中不属于同一类的单词,并将其标号填入题前括号内。 (1)A.window B.beef C.chicken D.soup (2)A.uncle B.English book C.baby brother D.aunt (3)A.phone B.table C.sofa D.friendly (4)A.wall B.floor C.near D.door (5)A.bedroom B.bowl C.study D.bathroom
听录音,选出你所听到句子的答语,将其标号填入题前括号内。每小题读两遍。 (1)A.It’s black and white.B.It’s in the bedroom. (2)A.I’d like some soup.B.I like some soup. (3)A.Thank you.B.Excuse me. (4)A.He is a cook.B.She is a cook. (5)A.His name is Mike.B.Her name is Sarah.
听辨单词。每小题读两遍。 (1)A.bedB.beefC.blackboard (2)A.fanB.fridgeC..friendly (3)A.wall B.windowC.white (4)A.strongB.sisterC.spoon (5)A.motherB.manyC.maths
--_____ she? -- She is Amy. A.What’s B.Who’s C.Where’s