关于风疹的皮疹特点描述错误的是（）。 A.通常于发热1～2日后发疹 B.先见于面、颈 发布时间：2017-08-13 21:41 │ 来源：www.tikuol.com 题型：单项选择题 问题： 关于风疹的皮疹特点描述错误的是（）。A.通常于发热1～2日后发疹B.先见于面、颈部C.1日内蔓延至全身D.手心和足心皮疹密集E.皮疹一般持续3日消退
题型：单项选择题 One will feel happy when others flatter( 奉承) him in his face. It is said that the best way of flattering someone is to give him a “top hat” 31 . A student was going to leave the capital to become 32 official (官员) in a city far away. Before he started, he came to say 33 to his teacher.“It is 34 job to be a good official.” his teacher said. “ you must be strict 35 yourself and never be careless.”“Don’t worry about me, sir.” The student answered. “I have already 36 anyone hundred top hats, which will 37 those people quite happy.”“But we are really gentlemen! 38 could a real gentleman do such a thing ? ” His teacher was a bit _39 . “ Never forget 40 I taught you in class!” “ 41 are always right, sir. I also hate such things. But, sir, 42 no one really gentleman like you can be seen in the world now.” said the student. It seemed that he had to do so. 43 hearing this, the teacher was pleased. “What you said is true!”“I have 44 one top hat already. Now I have ninety-nine 45 .” the student said to his friend later on when he asked the student what he had talked with the teacher about.小题1:A. to dress B. dressing C. wearing D to wear小题2:A．aB．the C．an D．/小题3:A．helloB．goodbyeC．OKD．thanks小题4:A．not an easyB．not easyC．a goodD．difficult小题5:A．aboutB．withC．fromD．to小题6:A．madeB．boughtC．preparedD．repaired小题7:A．giveB．letC．keepD．make小题8:A．HowB．WhatC．WhyD．When小题9:A．pleasedB．angryC．excitedD．sorry小题10:A．thatB．howC．whyD．what小题11:A．YouB．WeC．TheyD．Us小题12:A．hardlyB．aboutC．almostD．nearly小题13:A．BeforeB．AfterC．BecauseD．If小题14:A．sent outB．boughtC．soldD．borrowed小题15:A．leftB．alreadyC．yetD．else 查看答案
题型：单项选择题 （10分）金属镁可与热水反应生成一种碱和一种气体。某同学将镁条放在热水中煮沸，趁热取出部分溶液，滴加酚酞试液，溶液变为红色，放置在空气中一段时间后，发现溶液的红色褪去了。请根据以上信息回答：（1）同学们根据质量守恒定律，对生成的气体进行了两种推测：推测一：该气体是氢气；推测二：该气体是氧气。请选择上述任意一种推测进行实验验证。（3分）实验步骤实验现象实验结论 （2）反应后溶液滴加酚酞试液变红色，说明 ;（2分）（3）请你对放置一段时间后溶液红色褪去这种现象进行探究。(只要提出假设、方案，不需要说出方案实施的具体结果)（5分）假设一： 热的Mg(OH) 2溶液与空气的CO2反应，生成盐，溶液褪色。方案一：向热的Mg(OH)2溶液中滴加酚酞试液，再通入CO2，观察溶液颜色变化。假设二：_____________________________。方案二：_____________________________。 查看答案