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【单选题】
Which statement about cylinder head is fault?A.
The cylinder head is cast into one piece from iron only.
B.
The cylinder head is bolted to a very flat surface above the cylinder portion of the block.
C.
The cylinder head is used to hold the valves, and it has ports to allow air, fuel and exhaust to move through the engine.
D.
The cylinder head forms the upper portion of the combustion chamber.
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【单选题】It is the“single certificate”, a talking card for Singles' Day, falls on November 11, became a hot online bestseller this year.
A.
which; that
B.
that; which
C.
which; which
D.
that; that
【简答题】什么是生物转化？生物转化的意义是什么？
【简答题】Memorial Day falls on May 30th. It is a day in remembrance of war dead.
【判断题】Memorial Day, which falls on the last Monday of May, honors the people killed in the American Civil War.
A.
正确
B.
错误
【简答题】什么是生物转化？生物转化的意义是什么？
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