柴油机不好着火可能有哪些原因？
参考答案：
（1）检查喷油泵、灭火杆是否在灭火位置；（2）气门间隙不符规定；（3）汽缸进水；（4）机油油位过高。
It is the farm _____ we are going to pay a visit ______ provides large quantities of green vegetables for the nearby town every year.
A．to which, that
B．which, which
C．on which, that
D．which, where
项目合同管理实际上在( )阶段就已经开始了。
A．项目立项
B．项目可行性研究
C．项目准备
D．项目实施
