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【单选题】
下列说法或表示方法中，正确的是A.
等质量的硫蒸气和硫黄分别完全燃烧，前者放出的热量多
B.
a ℃、b kPa下，将0.5 mol O 2 和1.5 mol H 2 置于密闭容器中充分反应生成H 2 O(g)，放热c kJ，其热化学方程式为2H 2 (g)＋O 2 (g)＝2H 2 O(g) ΔH＝－2c kJ·mol －1
C.
常温常压下，2.8 g CO气体完全燃烧放出的热量为28.26 kJ，则表示CO燃烧热的热化学方程式为2CO(g)＋O 2 (g)＝2CO 2 (g) ΔH＝－565.2 kJ·mol －1
D.
稀硫酸溶液与稀NaOH溶液反应的中和热为57.3 kJ·mol －1 ，则稀醋酸溶液与稀NaOH溶液反应的热化学方程式可表示为CH 3 COOH(aq)＋NaOH(aq)＝CH 3 COONa(aq)＋H 2 O(l) ΔH＝－57.3 kJ·mol －1
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皮皮学刷刷变学霸
举一反三
【简答题】（ ）是指受国内组团旅行社委派，作为组团社的代表，为旅游者提供全程陪同服务的导游人员。
【单选题】the shoe repairer had done to the author is owing to the painters' lack of .
A.
responsibility
B.
a prideful traditon
C.
work experience
D.
enthusiasm
【单选题】The author thought the shoe repairer was the happiest man for the following except that________.
A.
he would always sing happily while working
B.
he was loved by the neighborhood children
C.
he was willing to referee argument and distribute candy among children
D.
he earned more money than needed
【简答题】是指受国内组团旅行社委派，作为组团社的代表，为旅游者提供全程陪同服务的导游人员。 A.地方陪同导游人员 B．全程陪同导游人员 C．景区景点导游人员 D．出境领队
【单选题】though he was gone, the shoe repairer had left the author a memorable lesson- .
A.
to start ,keep and carry on a prideful tradition
B.
to be good at your own handicraft
C.
to be happy with what you are doing
D.
to be proud of what you have done
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