In the emergency alarm signals, if the alarm or whistle two long sounds followed by one short sound for 1 minute, it is the （） emergency.

Two thousand dollars（）enough for the car

The knot used to join two lines or two large hawsers for towing is called a（）.

For one or two types of engine, the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.

For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through （）.

（）an order for one thousand tons or more we grant a special discount of 10%.

读网络教育学院非英语专业和非艺术类专业专升本的学生报考统考，除计算机应用基础外，还需报考（）

Two thousand dollars（）enough for the car.

The FEC mode is for（）from（）station to two or more other stations when available.

Two thousand dollars ______ enough for the car

（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.

Two thousand dollars（）enough for the car.