4G有两种制式,分别是哪两种()
A.TD-LTE
B.WCDMA
C.CDMA2000
D.LTE·FDD
参考答案:A, D
不属于进修生教学形式的是:()
A.举行专科进修班
B.开办短训班
C.自学
D.专项技术进修
I’m rather concerned how he will take in his school. ()
A. take on
B. take up
C. take off
D. take to