举一反三
- The crankshaft is used to change the ____________ motion of the piston into __________ motion. A: reciprocating, rotary B: rotary, reciprocating C: vertical, horizontal D: horizontal, vertical
- It is held in the crankcase in the cylinder block and converts the reciprocating motion of the pistons into a rotary motion for the drive wheels．
- Automotive engines are classified as the reciprocating engine and rotary engine according to the way they work; as the gasoline engine and diesel engine according to fuel they burn;
- 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
- The reciprocating motion of the pistons is changed to rotary motion as the crankshaft spins. 这句话的意思是旋转运动就转化为活塞的往复直线运动。
内容
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The reciprocating motion of the pistons is changed to rotary motion as the crankshaft spins. 这句话的意思是旋转运动就转化为活塞的往复直线运动。 A: 正确 B: 错误
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The air leakage of tubular air preheater is larger than that of rotary air preheater (). A: Right B: Wrong
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He preferred to write the letter by hand______. A: to typing it B: than type it C: to type it D: rather than type it
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What are the advantages and disadvantages of online shopping? Type your answer in the following space. No less than 100 words.
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下列程序的运行结果是（ ）。t = 0 while t < 5: print(t, " is less than 5") t = t + 1else: print(t, " is not less than 5") A: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 55 is not less than 5 B: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 55 is not less than 5 C: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 5 D: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 5