陈培爱在《广告学原理》描述的消费者行为特征有（）。
A.同步性
B.自主性
C.多样性
D.多变性
E.循环性
参考答案：A, C, D, E
An army spokesman stressed that all the soldiers had been ordered _____ clear warning before firing any shots.
A．to issue
B．being issued
C．to have issued
D．to be issued
涂膜防水层的施工应按（）
A.先高后低
B.先难后易
C.先左后右
D.先内后外
E.先远后近
