According to an analysis, compared with normal children today, children treated as mentally ill 50 years ago ______.
A. were less isolated physically
B. were probably less self-centered
C. probably suffered less from anxiety
D. were considered less individualistic
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货运机动车超过核定载质量多少或者违反规定载客的,处500元以上2000元以下罚款?
A. 15%
B. 20%
C. 25%
D. 30%
桥梁基础施工中,以下宜采用钻孔灌注桩施工的是( )。
A. 松散土层
B. 无地下水的土层
C. 碎石土层
D. 中密砂土土层
关于类的继承的特性,不正确的是( )。
A. 子类对父类具有数据和程序代码的共性特征
B. 子类与父类间有所差别
C. 会增加代码的冗余
D. 类间具有层次结构
在软件测试设计中,软件测试的主要目的是( )。
A. 实验性运行软件
B. 证明软件正确
C. 演示软件的正确功能
D. 发现软件错误而执行程序