下列哪个叙述是正确的? A.如果在类中显示地定义了构造方法,Java编译器将不再提供默认的构造方法。 B.一个类不可以把某个对象作为自己的一个成员变量。 C protected class Test是一个正确的类声明,即类可以是protected类(不包括后面学习的内部类)。 D.Java应用若干个类所构成,这些类必须在一个源文件中。
【单选题】On television all over the world there are programmes about the work of the police. They are popular because they are usually very exciting. In London there is a television programme called 'Police Fi...
【单选题】Which of the following sentences is INCORRECT? A . Poultry are very expensive in the city . B . New machinery were introduced in the factory . C . The police are investigating the murder case D . The...
A.
Poultry are very expensive in the city .
B.
New machinery were introduced in the factory .
C.
The police are investigating the murder case
D.
The militia were called out to rescue flood victims .
【简答题】根据所学主谓一致规则,判断以下句子正确还是错误。正确写T,错误写F。 1. Politics are the art or science of government. 2. Ten miles seems like a long walk to me. 3. Mumps is a kind of infectious disease. 4. All the furniture has arriv...
【简答题】用所给词的适当形式填空。 小题1:The police are looking for the __________(rob), but they still can’t find them. 小题2:The players all look forward to __________ (win)the . 小题3:________he ________(take)the bus to t...