【单选题】These books are ____ intended for those who learn how to use computers. It's an ABC of computer learning. [ ]
【判断题】收入类会计科目与费用类会计科目,一般没有期末余额但有期初余额。
【单选题】In this new course, you_______how to deal with communication problems.
【单选题】图示电路中电压 U ab 一定,合上开关 S ,电压表读数的变化为 。
【简答题】接受台胞捐赠一台设备,价值50,000元,材料20,000元。