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（请给出正确答案）
Pistons for modern engines are made of _______.
A cast iron
B steel
C aluminum-alloy
D tin-alloy
答案
更多“Pistons for modern engines are made of _______.A cast ironB steelC aluminum－alloyD tin”相关的问题
第1题
A.fram
B. narration
C.fragmented perspective
D.flashbacks and flash-forwards
E.psychologically laden symbolism
第2题
A. the ancient architects had no technology
B. the modern architects use more advanced technology
C. the modern buildings are advanced because they are completely different from the ancient buildings
D. the modern buildings are more beautiful
第3题
The sudden vowel shift in the history of English helped to shape ________ English.
A.Old
B.Middle
C.Early Modern
D.Late Modern
第4题
Does modern logistics mean transportation and delivery？
()Modern logistics is more about effective and efficient flow of materials and information.
A、 Yes, you’re right
B、 No, it’s not the whole story
C、 No, you' re wrong
第5题
The (first) Olympic (Games) (in) modern (time) took place in 1896.
A．first
B．Games
C．in
D．time
第6题
Modern medicine has made great__________ to the health and welfare of mankind．
A.distributions
B.contributions
C.attributions
D.tributes
第9题
Technologically, the modern buildings are more advanced. The sentence means _____. A. the ancient architects had no technology B. the modern architects use more advanced technology C. the modern buildings are advanced because they are completely different from the ancient buildings D. the modern buildings are more beautiful
第10题
Because of the complexity of our modern machine, we need our workers ______.
A. to train special
B. specified in training
C. to have specified training
D. training specially
第11题
In many modern countries, children go to school______.
A. by free education
B. to be able to marry
C. to work for society
D. to rid themselves of "low" work
