【单选题】His watch is ______ cheaper than mine. [ ]
【单选题】I don't think that his watch is ______.
【简答题】随着人类对温室效应和资源短缺等问题的重视,如何降低大气中CO 2 的含量及有效地开发利用CO 2 ,引起了各国的普遍重视.目前工业上有一种方法是用CO 2 来生产燃料甲醇.一定条件下,在体积为3L的密闭容器中,一氧化碳与氢气反应生成甲醇(催化剂为Cu 2 O/ZnO): CO(g)+2H 2 (g) CH 3 OH(g) 根据题意完成下列各题:反应达到平衡时, (1)平衡常数表达式K=______...
【单选题】Look! His watch is quite different _____! [ ]
【简答题】A.He wants the woman to fix his watch. B.He will call her when the watch is fixed. C.He wants her to fix the watch within one week. D.He doesn't want to go home.
【单选题】His watch is _______ by hand, not by machine, so it is very expensive.