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【简答题】
如果某一体系从状态A变到状态B有两种途径:一种是经C到B状态;另一种是经D到E,最后到B状态.体系内能的改变值为( ) A. △U > 0; B. △U<0; C. △U = 0 D. △U = UB - UA.
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举一反三
【简答题】The New York Times published an article recently that shows great regret for the 'death of conversation'．It suggests that while technology such as cell phones, e-mails, and Internet posting makes us f...
【单选题】On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the______.
A.
accumulator spring compression
B.
balance piston
C.
compensating(补偿) needle valve
D.
proportional piston
【单选题】对于构造方法,下列叙述不正确的是( )。
A.
构造方法是类的一种特殊方法，它的方法名必须与类名相同。
B.
构造方法的返回类型只能是void型，且书写格式是在方法名前加void前缀。
C.
构造方法的主要作用是完成对类的对象的初始化工作。
D.
在创建新对象时需要调用类的构造方法。
【简答题】in many cases 汉语意思
【单选题】An article published recently in the prestigious scientific journal Nature is shedding new light on an important, but hitherto little has been appreciated, aspect of human evolution. In this article, ...
A.
was only recently described in a scientific journal
B.
played an important part in human evolution
C.
is now regarded as more important than the ability to climb trees
D.
is surprising when we consider evolutionary trends
【单选题】关于构造方法,下列叙述错误的是 ( ) 。
A.
构造方法是类的一种特殊方法，它的方法名必须与类名相同
B.
构造方法的返回类型只能是void型，且书写格式是在方法名前加void前缀
C.
构造方法的主要作用是完成对类的对象的初始化工作
D.
一般在创建新对象时，系统会自动调用构造方法
【单选题】Our students' educational achievements equal, and in many cases______those of students in previous years.
A.
surpass
B.
advance
C.
increase
D.
multiply
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