下面（）部件不是接收机的组成部分。
A.检波器
B.中频放大器
C.调制器
D.本地振荡器
参考答案：C
.
He has an extraordinary talent ______ painting and his works have been ______ display throughout the country .
A for in ; B in on ; C for on ; D with on
34. The international agreement, ________ to encourage children not to smoke and help people
kick the habit, was signed on February 27.
A．intended
B．being intended
C．intending
D．to intend
