举一反三
- Sails are still valuable until the ship becomes large enough to install two engines next to each other. A: A B: B C: C D: D E: E F: F G: G H: H I: I J: J K: K L: L M: M
- New cars are becoming faster and faster because ______. A: the efficiency of the engines has improved a lot B: the engines are more powerful C: people like driving fast D: highways provide enough chances for fast driving
- In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.
- Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.
- Which of the following will be the function of lubricating oil used in marine engines?（）
内容
- 0
It’s important to keep in mind the deadlines that are given, so we should ____. A: start early enough B: finish it in a haste C: wait until the deadline
- 1
According to the fuel an engine burns, there are ________. A: reciprocating and rotary engines B: gasoline and diesel engines C: 4-cylinder and 6-cylinder engines D: inline and boxer engines
- 2
Why didn’t the closest ships come to the Titanic’s rescue A: Because they did not hear Titanic’s desperate calls for help. B: Because they didn’t want to get involved in the accident. C: Because they hit each other while rushing to rescue. D: Because they didn’t have enough fuel.
- 3
Sea water is not directly used as a coolant for engines because of its （）.
- 4
The board of directors didn’t side with Jobs because .