平均消费倾向和边际消费倾向都是递减的。
参考答案：对
22.Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.
A．that
B．why
C．how
D．Whether
涂饰工程的细部构造一般指( )。
A．阴阳角
B．分色线、线角
C．拼接处花纹
D．软包接缝
