两个交流转换汇流条可以由（）。
A.一个CSD在空中和地面同时供电。
B.一个APU发电机同时在空中和地面供电。
C.以上都对。
参考答案：C
The old man said the accident________careless driving, so a lot of money________be paid by the
driver. [ ]
A. was due to; was due to
B. due to; was due to
C. is due to; has due to
D. is due to; was due to
鉴别水肿型和出血坏死型胰腺炎最有价值的是
A．上腹剧痛向左腰背部放射
B．黄疸
C．发热
D．Cullen征
E．呕吐
