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【简答题】
When faced with ____ options, XiangYu proved to a wonderful decision-maker. He took his troops making a _____ into enemy territory. To his troops’___________, he ordered their cooking pots crushed and their sailing ships burned, which gave his troops only one _______: to win the battle. The battle turned out to be a great success on his side. This story indicates that while closing the door for doing something, people may open the _______ for achieving something more significant. Through conducting an experiment on human’s ________ behavior, Dr. Ariely, found that many students in his experiment just couldn’t bear to see their options _______ though they knew it would benefit them to ______. He then emphasizes that in life the doors are actually closing slowly and we don’t see the future vanishing away. To solve this problem, people can balance their lives by reducing ___________options on their own and keeping those activities that will actually enrich their lives. To conclude, we should close certain doors in order to allow the right windows of _______________________ to open.
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【单选题】Father often tells me——too much time on computer games.
A.
don’t spend
B.
not spend
C.
not to spend
D.
not spending
【简答题】已知反应 H 2 O 2 (l) → H 2 O (l) + 1/2 O 2 (g) 的△ r H m Θ = -98.0 kJ·mol -1 , H 2 O (l) → H 2 O (g) 的△ r H m Θ = 44.0 kJ·mol -1 ,则 1.00×10 2 gH 2 O 2 (l) 分解为 H 2 O(l) 和 O 2 (g) 时放出 ___ kJ 的热量,反应 H 2 O(g...
【简答题】请找出该可行性研究报告存在哪些问题。 吸发式电推剪生产可行性研究报告 一、国际国内理发业目前使用的电推剪的缺点 据初步调查,国际(亚洲如韩国和日本、美洲如美国、欧洲如意大利、中东如以色列等)国内理发业目前广泛使用的电推剪在进行理发作业时,存在如下缺点:第一,被剪断的发屑以及头屑会散落飞到人们的头上、脸上、子里、衣服上、理发座椅及其附近地面上,同样会散落或飞溅到理发人员的脸上、双手和衣服上,不仅令人...
【单选题】在 某 温 度 下, 反 应: 2H 2 (g) + O 2 (g) → 2H 2 O(g) △ r Hm θ (1) 2H 2 (g) + O 2 (g) → 2H 2 O(l) △ r Hm θ (2) 则 在 该 温 度 下, 反 应 H 2 O(l) → H 2 O(g) 的 △ r Hm θ 为 .............. ( )。
A.
[ △ r Hm θ (1) - △ r Hm θ (2) ] / 2 ；
B.
△ r Hm θ (2) - △ r Hm θ (1) ；
C.
[ △ r Hm θ (2) - △ r Hm θ (1) ] / 2 。
D.
△ r Hm θ (1) - △ r Hm θ (2) 。
【单选题】在某温度下,反应: 2H 2 (g)+O 2 (g) → 2H 2 O(g) △ r (1) 2H 2 (g)+O 2 (g) → 2H 2 O(l) △ r (2) 则在该温度下,反应 H 2 O(l) → H 2 O(g) 的△ r 为 . ( )。
A.
△ r (1)- △ r (2)
B.
[ △ r (1)- △ r (2)]/2
C.
△ r (2)- △ r (1)
D.
[ △ r (2)- △ r (1)]/2
【单选题】电池反应 2H2（g）+O2(g)→2H2O(l) E1 H2（g）+1/2O2(g)→H2O(L) E2则有：( )
A.
E 1 =1/2E 2
B.
E 1 =E 2
C.
E 1 =2E 2
D.
不能确定
【简答题】着改革开放的深入发展，我国人民生活水平不断提高，人们的消费观念和方式发生了很大变化，对此，某校学生就本校中学生消费情况进行调查，调查结果如下：
材料一：学生生日宴请：90%以上学生过生日都要相互宴请，购买礼物赠送，而且宴请规模、赠送礼物程度呈扩大趋势。平时节日：98%以上同学都互相送贺卡，且贺卡档次越来越高，价格越来越贵。原因：同学们都这么做，不请不送丢脸面。
材料二：中学生个人消费情况：手中...
【简答题】As to the time youngsters spend on electronic devices, they spend __________ hours a day altogether. [A] 6.5 [B] 7.5 [C] 9.5 [D] 11
【简答题】已知下列反应： (1)2H 2 O 2 (1)→2H 2 O(1)+O 2 (g) =-196.1kJ·mol -1 (2)H 2 O(1)→H 2 O(g) =44.01kJ·mol -1 求：(1)180gH 2 O 2 (l)分解的反应焓变△ r H Θ ? (2)反应H 2 O 2 (l)→H 2 O(l)+1/2O 2 (g)的 ? (3)反应2H 2 O(l)+O 2 (g)→2H 2...
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