TD-LTE系统中信道质量高且空间独立性强的场景下采用哪种传输模式()
A、TM1
B、TM2
C、TM3
D、TM7
参考答案:C
All the students are talking and laughing in the classroom and it’s _________.
A.noisy
B.lonely
C.quiet
D.strict