FBZL-16型轮胎式防爆装载机使用的油料必须清洁，并符合规定的牌号和质量标准。
参考答案：对
（ふゆ）の （あさ）は さむくて いやです。
Hospital staff burst into cheers after doctors completed a 20hour operation to have _________ one-year-old twins at the head.
A．isolated
B．separated
C．divided
D．removed
