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(1)已知:C 3 H 8 (g)+5O 2 (g) ===3CO 2 (g)+4H 2 O(1) △H=-2220.0kJ/mol H 2 O(1) ===H 2 O(g);△H=+44.0kJ/mol 写出丙烷燃烧生成CO 2 和气态水的热化学方程式 。 (2)在如图所示的实验装置中,E为一张用淀粉碘化钾溶液润湿的滤纸,C、D为夹在滤纸两端的铂夹,X、Y分别为直流电源的两极。在A、B中充满AgNO 3 溶液后倒立于AgNO 3 溶液的水槽中,再分别插入铂电极。切断电源开关S 1 ,闭合开关S 2 ,通直流电一段时间后,B电极质量增重,A极产生无色气体。请回答下列问题: ① 写出D电极反应式: ; ②写出水槽中电解AgNO 3 溶液总反应的离子方程式: ,阴极增重2.16 g,则阳极上放出的气体在标准状况下的体积是____ _L。
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【单选题】( )是目前最好、最专业的电商开源程序,各种配套都非常齐全,只要有一个账号就能开发出你需要的各种功能。
A.
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B.
ZEN-CART
C.
Wechat
D.
PayPal
【简答题】产品批量不大、工序的单件作业时间较短的情况下适合采用( )移动方式
【单选题】―I'm taking part in the speech competition to be held in our city next month! ―______! [     ]
A.
Wonderful
B.
Enjoy yourself
C.
Congratulations
D.
Good Luck
【单选题】- Have you got any good ideas for the project yet? - Yes, I’ve just______something wonderful.
A.
gone in for
B.
got along with
C.
come up with
D.
made up for
【简答题】某银行观察平时到银行柜理业务的人员的性别(用 M 表示男性,F 表示女性 )依次如下: F M M M M M F M M F M M M M F M F M M M F F F M M M 查表可知,临界值为c 1 =7,c 2 =17 , 问人员的性别出现的是否是随机的?(填是或否)
【简答题】Some people would like to go shopping on Sundays since they expectto pick up wonderfulin the market. A) batteries B) bargains C) baskets D) barrels
【单选题】— Did you have a wonderful time at the ball last night? — __________! I’ve never had a more wonderful time all my life.
A.
You bet
B.
No problem
C.
Don’t mention it
D.
Got it
【简答题】女性 _ _m_ _ _
【简答题】– 1~10 之间的整数相加,得到累加值大于 20 的当前数
【单选题】–The head teacher with his students ______ Zhongshan Park if it _____ tomorrow. --That sounds wonderful.
A.
is going to, isn’t rainy
B.
are going to, isn’t rainy
C.
is going to, won’t rain
D.
are going to, doesn’t rain
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