下列金属中,不能从Hg(NO3)2溶液中置换出汞的是( ) A.Fe B.Mg 发布时间:2017-06-16 23:11 │ 来源:www.tikuol.com 题型:选择题 问题: 下列金属中,不能从Hg(NO3)2溶液中置换出汞的是( )A.FeB.MgC.CuD.Ag
题型:选择题 Questions 14-18 ·Using the information in the text, complete each sentence 14-18, with a word or phrase from the list below. ·For each sentence (14-18), mark one letter (A-G) on the Answer Sheet. ·Do not mark any letter twice.A. $150B. safeC. agreementsD. drivers who can’t drive on because of the flat tireE. a flat tireF. provide a kind of temporary support to the flat tireG. more than $150According to the passage, Quickwheel is a tool that can be used to replace ______. 查看答案
题型:选择题 关于鱼类寄生性纤毛虫的主要特征,下列描述不正确的是()A.成体或幼体具纤毛运动器,多数种类终生全身被有纤毛,有的只在生活某一阶段存在纤毛B.虫体由囊膜、胞质和胞核组成C.纤毛在电镜下的亚微结构与鞭毛不同,较短,数目多,运动节奏性强D.生活史有营养期和胞囊期,靠胞囊或直接接触传播 查看答案