题目

第二节  选词填空(共8小题;每小题1分,满分8分) 从方框内选择适当的单词或短语用其正确形式填空 the first time , dream about, at an end , communicate with, think of, devote to, put up, fight for, suffer from, happen to 1. In the evening they _________________ their tent and began to eat. 2. Actually all languages change and develop when cultures meet and ______________________ each other. 3. He couldn’t eat much because he ___________________ stomachache. 4. My roommate _________________ have moved away so you can share the room with me. 5. I must war生产甲醇的原料CO、H2可由下列反应制取:CH4(g)+H2O(g) CO(g)+3H2(g),试回答下列问题。(1)已知:① CH4(g)+3/2 O2(g) CO(g)+2H2O(g)△Hl;② H2(g)+1/2 O2(g) H2O(g) △H2,则CH4(g)+ H2O(g)CO(g)+3H2(g)的△H=____   (用含△H1,△H2的式子表示)(2)一定条件下反应CH4(g)+H2O(g)CO(g)+3H2(g)中CH4的平衡转化率与温度、压强的关系如图,且T2>T1, 则上述反应的△H____   0(填“<”、“>”、“=”,下同),A、B处对应平衡常数(KA、KB)的大小关系为KA___    KB(3)维持温度T2,将0.04 mol CH4和0.04mol H2O(g)通入容积为1L的定容密闭容器中发生反应,平衡时达到B点,测得CH4的转化率为50%,该反应在此温度下的平衡常数KB=____  ,下列现象能说明该反应已经达到平衡状态的是_  a.容器内CH4、H2O、CO、H2的物质的量之比为1:1:1:3????b.容器的密度恒定c.容器的压强恒定????????????????????d.3υ正(CO)=υ逆((H2)
英语 试题推荐