__________ warmly for his work, he was t

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问题选择题

__________ warmly for his work, he was too excited __________ asleep.[ ]

A. Praising; to fall

B. To praise; to fall

C. Praised; falling

D. Praised; to fall

答案

答案：D

单项选择题

WCDMA的英文全称是Wideband Code Division Multiple Access，即宽带码分多址。其系统带宽是5MHz，码片速率为（）。

A.1.2288Mbps

B.1.28Mbps

C.3.84Mbps

单项选择题

如图所示电路中，已知U_s＝10V，R₁＝3kΩ，R₂＝20kΩ，R₃＝1kΩ，L＝1H，电路原已稳定，在开关S断开的瞬间，电阻R₂上的电压u（0＋）最接近于（）V。

A.－50

B.0

C.10

D.50