LTE系统中,相对于16QAM,应用64QAM的优点是哪个?
A. 提升了抗噪声、抗衰绕性能
B. 提升了频谱利用率
C. 降低系统误码率
D. 实现更简单
In 1932, all adults in Scotland did an Intelligence test.
A. 对
B. 错
Many of the same people do the test again nearly 70 years later.
A. 对
B. 错
The program can tell us how to live longer.
A. 对
B. 错
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