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Java中下面句话是正确的()。
A.>>是算术右移操作符
B.>>是逻辑右移操作符
C.>>>是逻辑右移操作符
D.>>>是算术右移操作符
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A.>>是算术右移操作符
B.>>是逻辑右移操作符
C.>>>是逻辑右移操作符
D.>>>是算术右移操作符
A.程序执行过程中需要的所有类都是通过字节码校验程序装入的
B.代码的运行是由Java运行环境中的解释器完成的
C.在运行时,字节码要经过装入,校验之后,才能在解释器中执行
D.在缺省的安全配置条件下,Java pplet不能访问任何本地资源
从供选择的答案中选出应填入下面一段英文中______内的正确答案。
Java was introduced by Sun Microsystems in 1995 and instantly(1)created a new sense of the interactive possibilities ofthe Web. Both ofthe major Web browsers include a Java(2)virtual machine. Almost all major operating system developers (IBM, Microsoft, and others) have added Java(3)compilers as part oftheir product offerings.
The Java virtual machine includes an optional just-in-time compiler that(4)dynamically compiles bytecode into executable code as an alternative to(5)interpreting one bytecode instruction at a time. In many(6)cases, the dynamic JIT compilation is faster than the virtual machine interpretation.
JavaScript should not be(7)confused with Java. JavaScript, which originated at Netscape, is interpreted at a higher level, is easier to learn than Java, but(8)lacks some of the portability of Java and the speed of bytecode. Because Java applets will run on almost any operating system without(8)requiring recompilation and because Java has no operating system-unique extensions or variations, Java is generally regarded as the most strategic(10)language in which to develop applications for the Web.
供选择的答案:
1.confused 2.compilers 3.dynamically 4.requiring 5.cases
6.interpreting 7.language 8.virtual 9.created 10.lacks
A.上策均衡是比纳什均衡更高的均衡概念
B.上策均衡的存在性比纳什均衡差
C.许多博弈没有上策均衡但有纳什均衡
D.上策均衡肯定是纳什均衡,但纳什均衡不一定是上策均衡