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【简答题】
请简述四冲程汽油机与四冲程柴油机的异同点。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】( 多选 ) 关于机械波的说法正确的是 ( )
A.
．相邻的质点要相互做功
B.
．机械波在真空中也能传播
C.
．波源开始时怎样振动，其他质点开始时就怎样振动
D.
．除波源外，波中各质点都做受迫振动
【单选题】Select the one of the following statements that is NOT CORRECT :
A.
Protein folding is assisted by intervention of specialized auxiliary proteins called chaperone.
B.
Protein folding tends to be modular, with areas of local secondary structure forming first, then coalescing into a molten globule.
C.
Protein folding is driven first and foremost by the thermodynamics of the water molecules surrounding the nascent polypeptide.
D.
The formation of S-S bond in a mature protein is facilitated by the enzyme protein disulfide isomerase.
E.
Only a few unusual proteins, such as collagen, require posttranslational processing by partial proteolysis to attain their mature conformation.
【单选题】Select the one of the following statements that is NOT CORRECT :
A.
Protein folding is assisted by intervention of specialized auxiliary proteins called chaperone.
B.
Protein folding tends to be modular, with areas of local secondary structure forming first, then coa
C.
Protein folding is driven first and foremost by the thermodynamics of the water molecules surroundin
D.
The formation of S-S bond in a mature protein is facilitated by the enzyme protein disulfide isomera
E.
Only a few unusual proteins, such as collagen, require posttranslational processing by partial proteolysis to attain their mature conformation.
【多选题】下列关于机械波的说法中正确的是
A.
有机械振动就有机械波
B.
有机械波就一定有机械振动
C.
机械波是机械振动在介质中的传播过程，它是传递能量的一种方式
D.
没有机械波就没有机械振动
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