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【判断题】
在 Java 中,包含抽象方法的类必须声明为抽象类。( )A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
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【单选题】我国《水土保持法》规定，对水源涵养林、水土保持林、防风固沙林等防护林
A.
可以进行皆伐
B.
只准进行择伐
C.
只准进行抚育和更新性质的采伐
D.
禁止任何性质的采伐
【单选题】—May I go out for an outing with you tomorrow? —If your mother______. [ ]
A.
will let
B.
will allow
C.
let
D.
agrees
【简答题】____物流量是指一定时间内通过两物流点间的物料数量。
【单选题】—May I go out for a while, Mom? —No, you _________. You have to finish your homework first.
A.
shouldn't
B.
needn't
C.
mustn't
D.
won't
【简答题】--- Sir, may I go out for a short rest?--- ______.A. No, you had better not B. No, you aren't able to C. No, you won't D. No, you needn't
【单选题】—Must I go out for a walk now? —No, you ______. [ ]
A.
mustn't
B.
can't
C.
needn't
D.
may not
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