6240ZJ柴油机发生飞车时，切断燃油后，此时柴油机应加载而不能减载。
参考答案：对
This area has been free from Foot-and-Mouth Disease ( ) two years.
A．for
B．in
C．after
D．before
简述酸水解法脂肪的测定原理？
