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【单选题】
以下叙述中正确的是A.
C程序中的注释只能出现在程序的开始位置和语句的后面
B.
C程序书写格式严格,要求一行内只能写一个语句
C.
C程序书写格式自由,一个语句可以写在多行上
D.
用C语言编写的程序只能放在一个程序文件中
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举一反三
【单选题】Which energy change corresponds to the enthalpy change of atomisation of hydrogen at 298 K?
A.
.the bond energy of a H – H bond
B.
.half the bond energy of a H – H bond
C.
.minus half the bond energy of a H – H bond
D.
.minus the bond energy of a H – H bond
【单选题】Which of the following is true according to the passage?
A.
Man's energy cycle can be changed easily.
B.
Some family quarrels are caused by unawareness of energy cycle.
C.
Getting up early in the morning is not easy.
D.
Everyone has a daily energy cycle but a lazy one.
【简答题】进气道的作用？什么是进气道总压恢复系数？
【多选题】The standard free-energy change (△G'°) tells us in which direction and how far a given reaction must go to reach equilibrium when ______________________________.
A.
the initial concentration of each component is 1.0 M
B.
the pH is 7.0
C.
the temperature is 25 °C
D.
the pressure is 101.3 kPa (1 atm).
【单选题】Which energy change corresponds to the electron affinity of fluorine?
A.
2
B.
5
C.
4
D.
1
E.
6
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