使用中压干式回烧防止器时，要求乙炔所含（）要低。
A.水分和杂质
B.烟尘
C.净化剂
参考答案：A
On the sea near Diaoyu Island, ____ Chinese fishing boat was stopped by the Japanese and ___ sailors
were arrested illegally.[ ]
A. a; the
B. the; the
C. a; 不填
D. the; 不填
会计核算应当以实际发生的交易或事项为依据，如实反映企业的财务经营成果和现金流量，这是会计核算的______。
A．客观性原则 B．重要性原则 C．可比性原则 D．相关性原则
