【简答题】When we think about happiness, we usually think of something extraordinary, a pinnacle(顶点) of sheer(纯粹的) delight. And those pinnacles seem to get rarer the older we get. 小题1: I remember playing police...
【简答题】某1000m 3 高炉,利用系数为2.45,生产1t生铁消耗干料(kg/t):焦比474.2、煤比66.8,烧结矿1690,澳矿116.6,石灰石24.5;生铁成分(%):Fe—94.56,C—4.50,Si—0.52,Mn—0.29,P—0.10,S—0.03;炉顶煤气成分(%,体积分数):CO—23.70、CO 2 —18.18、N 2 —56.32、CH 4 —0.6、H 2 —1.2;大气...
【单选题】妊娠 38 周孕妇,腹部检查:子宫呈纵椭圆形,胎先露部较软,胎心在脐上偏左闻及,胎先露应是
【简答题】化肥厂生产合成氨的原料是煤、空气、水。生产简要流程如下: 煤气发生炉中主要反应:①C + O 2 = CO 2 ;②C + H 2 O =' CO' + H 2 。两个反应必须进行调控才能保持一定的炉温。判断:反应②____ ____(填“放出”或“吸收”)热量。 将合成的氨气部分通入碳化塔,既除去了二氧化碳又得到了化肥NH 4 HCO 3 ,试写出该反应的化学方程式____ ____。
【简答题】在H 2 、O 2 、CO、CO 2 、SO 2 、CH 4 六种气体中,能使带火星木条复燃的气体是______;可称为最清洁燃料的气体是______;会形成酸雨的气体是______;在炼铁高炉中与铁的氧化物反应的气体是______;天然气的主要成分是______;可用于灭火的气体是______.
【单选题】When we think about happiness, we usually think of something extraordinary--and those pinnacles of sheer delight--and those pinnacles seem to get rarer the older we get. For a child, happiness has a m...
A.
They may get happiness from games.
B.
They may feel happy if they get a role in a school play.
C.
They feel happy all the time.
D.
An ordinary event may put them at a pinnacle of sheer delight.