绘图题:绘制全双工通信方式图。
参考答案:
癫与狂的多发人群是:
A.老年男性
B.青壮年
C.中老年男性
D.老年女性
E.体弱之人
Mr. Black is very happybecause the clothes made in his factory have never been _____.[ ]
A. popular
B. more popular
C. most popular
D. the most popular