教师通过展示实物、直观教具或实验使学生获得知识或巩固知识的方法是( )
A．演示法
B．实验法
C．实习作业法
D．练习法
参考答案：A
21. It is hard to make a living nowadays and since we are slightly _______, the amount of your weekly pocket money has to ______
A．with debt; be reduced
B．in debt; be cut down
C．with debts; cut down
D．in debts; be cut down
球无论从什么方向看，看到的都是圆形．______．（判断对错）
