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【简答题】
(16分)A、B、C、D、E为中学化学常见的单质或化合物,相互转化关系如图所示(部分产物略去): (1)若A是能使湿润的红色石蕊试纸变蓝的气体,C、D均为空气的主要成分,E是一种有毒气体. ①C的电子式为_______________. ②写出反应Ⅱ的化学方程式______________________. (2)若A是淡黄色化合物,常温下D是无色气体,C中含有的阴、阳离子均为10电子粒子. ①C中所含化学键的类型是____________. ②写出反应Ⅲ的离子方程式______________________. (3)将(2)中一定量的气体D通入2 L C的溶液中,在所得溶液中逐滴加入稀盐酸至过量,并将溶液加热,产生的气体与HCl物质的量关系如图所示(忽略气体的溶解和HCl的挥发). ① O 点溶液中所含溶质的化学式为_____________, a 点溶液中各离子浓度由大到小的关系是_______________. ②标准状况下,通入气体D的体积为_____L,C溶液的物质的量浓度为_____mol·L -1 .
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举一反三
【简答题】__________ (由于他们之间利益上的根本冲突) the two will never co operate.
【单选题】When prisoners were selected for the work
A.
many of them refused to co-operate.
B.
their previous behavior. was taken into account.
C.
they were told they must work in all weathers.
D.
they were warned that there would be no privileges.
【单选题】Those two will never co-operate while there's such a basic ______ of interest between them.
A.
confusion
B.
contradiction
C.
contest
D.
conflict
【单选题】某台计算机的TP地址为“192.168.36.48“,子网掩码为“255.255.255.0”,则该计算机的主机地址是()。
A.
48
B.
192
C.
168
D.
36
【判断题】在“两个一百年”奋斗目标的历史交汇期。我们既要全面建成小康社会、实现第一个百年奋斗目标，又要乘势而上开启全面建设社会主义现代化国家新征程，向第二个百年奋斗目标进军。()
A.
正确
B.
错误
【单选题】I was to co-operate without having more information. [ ]
A.
willing
B.
unwilling
C.
ready
D.
satisfied
【简答题】实现第一个百年奋斗目标是
【单选题】What does the phrase 'to run errand' mean in this context?
A.
To go shopping.
B.
To operate computers.
C.
To help do something.
D.
To shop electronically.
【单选题】He was unprepared to co-operate, or indeed to ______.
A.
streamline
B.
qualify
C.
communicate
D.
concise
【单选题】如期实现第一个百年奋斗目标并向第二个百年奋斗目标迈进，最艰巨最繁重的任务在( )，最广泛最深厚的基础在( )，最大的潜力和后劲也在( )。
A.
农业
B.
农民
C.
农村
D.
三农
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