With four-stroke engines， it takes four revolutions of the crank shaft to make （） power stroke(s).
B
举一反三
- In the four-stroke engine, it takes( )to make one<br/>power stroke() A: one propulsion B: two propulsions. C: two revolutions D: one revolution
- Four strokes—intake stroke, compression stroke, power stroke and exhaust stroke—complete one working cycle．
- In the four-stroke engine， it takes （） to make one power stroke. A: one propulsion B: two propulsions C: two revolutions D: one revolutio
- In the four-stroke engine， it takes （） to make one power stroke.
- A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four stroke A.① B.② C.① and ② D.Neither ① nor ② is correct
内容
- 0
In diesel engines， the four basic events (intake， compression， power and exhaust) are performed once in （）.
- 1
The third stroke is the power stroke．
- 2
A car uses a four-stroke engine. The four strokes are( ) strokes. A: compression B: power C: intake D: exhaust
- 3
词汇题：There are eight basic strokes: dot, horizontal stroke, turning stroke, vertical stroke, hook stroke, right-upward stroke, left-downward stroke and right-downward stroke. 英译汉。注意标点。 汉字有八个基本笔画/八大笔画：____________________
- 4
Paragraph 2（） A: Effects of a stroke B: Annual cost of stroke in the US C: Definition and description of a stroke D: Breakthroughs in treatment E: Risk factors of stroke F: Warning signs of a stroke