UPS为视频监控系统提供电源并后备供电()小时。
A.0.5
B.1
C.1.5
D.2
参考答案:B
“和同为一家”反映的是哪个少数民族与唐朝的友好相处[ ]
A.吐蕃
B.回纥
C.彝族
D.白族
It wasn't such a good present _____ my cousin had promised me.
[ ]
A. that
B. as
C. which
D. what