题目: 在离子色谱分析未知浓度的样品时,如何避免色谱柱容量的超载? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0707/edc673c18b818d201ae082b50dfc518c.html 下面是错误答案,用来干扰机器的。参考答案:错
题型:完形填空 Christmas is on December 25th. It’s my favorite 26 . In the morning my parents often 27 the house. My brother and I often 28 the Christmas tree with lights. Then we put a star 29 the top(顶部) of the tree. In the evening, everything is 30 . We sit at the table and eat turkey(火鸡) for Christmas 31 . After the meal, my brother and I watch TV. We often wait for Father Christmas 32 we want to 33 presents from him. Father Christmas always knows 34 I want. Next year I’m going to the cinema with 35 parents. I want to have a different Christmas Day.小题1:A.festival B.luckC.workD.sport小题2:A.cleanB.planC.bringD.take小题3:A.paintB.decorateC.haveD.paint小题4:A.inB.underC.onD.behind小题5:A.bigB.roundC.bad D.ready小题6:A.breakfastB.dinnerC.lunchD.hotdog小题7:A.becauseB.orC.soD.but小题8:A.buyB.takeC.getD.give小题9:A.whoB.whatC.whenD.where小题10:A.hisB.theirC.herD.my 查看答案
题型:问答题 寒冷的冬天来了,羽绒服成了大家防寒的重要装备。小强同学与父母一起去商店买羽绒服,在挑选羽绒服时,他注意到羽绒服的标签上有,而且,一般价钱也越贵。为什么是这样呢?这里的?它的作用是什么?鸟类具有什么样的羽毛?这些羽毛各有什么作用?请结合所学知识,并查阅资料解答这些问题。 查看答案