题型：问答题 简答题 Someone says，“Time is money”，but I think time is 1 important than money．Why? Because when money is spent，we can get it back．However，when time is 2 ，it’ll never 3 ．That is 4 we mustn’t waste time．It goes without saying that the 5 is usually limited（有限的）．Even a second(秒) is very important．We should make full use of (充分利用)our time to do 6 useful．But it is a pity that there are a lot of people who do not know the importance of the time．They spent their limited time smoking，drinking and 7 ．They do not know that wasting time means wasting part of their own 8 ．In a word，we should save time．We shouldn’t 9 today’s work for tomorrow．Remember we have no time to 10 ．小题1:A．muchB．lessC．mush less D．more小题2:A．costB．bought C．goneD．finished小题3:A．returnB．carryC．takeD．bring小题4:A．whatB．thatC．becauseD．why小题5:A．moneyB．timeC．dayD．food小题6:A．nothing B．somethingC．anythingD．everything小题7:A．reading B．writing C．playingD．working小题8:A．timeB．foodC．money D．lives小题9:A．stopB．leaveC．letD．give小题10:A．loseB．saveC．spend D．take 查看答案
题型：问答题 简答题 根据下图回答问题：（1）写出标有序号的仪器名称：a______，b______．（2）CO和Fe2O3均属于（填序号）______．①单质 ②氧化物 ③酸 ④碱 ⑤盐（3）澄清石灰水中可观察到的现象是______．（4）点燃b的目的是______．（5）高温条件下此反应的化学方程式为______． 查看答案
题型：问答题 简答题 队列研究证明暴露因素E是疾病D的危险因素（RR＝3，P<0.05）。但进行以医院为基础的病例对照研究时，发现病例与对照组暴露情况没有显著性差异（OR=1.1，P>0.05）。进一步分析显示，这种病例对照研究与队列研究结果之间的差异，是因为患者在诊断出此病后往往会改变其行为习惯，从而使患者的暴露情况改变。这属于下列哪一种偏倚？（）A.检出偏倚B.易感性偏倚C.Neyman偏倚D.Berkson’s偏倚E.诊断怀疑偏倚 查看答案
