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【单选题】
烹饪原料按其性质分可分为动物原料、植物原料、矿物原料、( )四类。A.
人工合成原料
B.
配料
C.
复制品原料
D.
调料
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皮皮学刷刷变学霸
举一反三
【简答题】翻译下面一段文字 Overhead camshafts: The camshaft(or camshafts, depending on the design employed) is located above the valves within the cylinder head, and operates either indirectly or directly on the valves...
【单选题】据记载,文成公主入藏时,携带的嫁妆有释迦佛像, 360 卷经典,大量珍宝、金鞍玉辔、绸帛、种子, 60 种营造与工技著作, 100 多种医方、 4 种医学论著等。丰富的嫁妆种类折射出唐朝( ) A . B . C . D .
A.
对边疆统治加强
B.
民族交融成为主流
C.
经济文化的繁荣
D.
开元盛世成就辉煌
【单选题】In overhead-valve engines,the camshaft is located in bearing in the cylinder block or ______.
A.
pump
B.
crankshaft
C.
crankcase
D.
valve
【简答题】The valve mechanism consists of valves, 1 , push-rod, lifters and the camshaft. It makes air fuel mixture and 2 in and out of the engine at the proper time. The timing is conntrol by the 3 . As to mos...
【简答题】翻译下面一段文字: Cam-in-block: The camshaft is located within the engine block, and operate directly on the vavles , or indirectly via pushrods and rocker arms. Because they often require pushrods they are o...
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