题目内容
（请给出正确答案）
A.boiler
B.separator
C.incinerator
D.treatment lological sewage
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更多“Theois designed with a primary combustion chamber for burning sludge oil and ／or solid waste, and tw…”相关的问题
？？？？We do？？ not know how the first fire was（1）.Early fires on the earth were certainly caused by nature,not by Man,some were caused by lightning in a storm;（2）,perhaps,by the hot material which came out of a volcano.Quite possibly,at times,the heat of the sun set light（3）some dry grass or leaves.At first Man,like other animals,was probably afraid of fire.（4）great was the power of fire that he feared it and wors hipped it.Gradually,however,with his better power of thinking,he overcame his fear.Probably he overcame most of his fear when he（5）how to make fire for himself.Throughout the ages he has learned more about fire,how to control it,and how to use it（6）many ways.Now fire is no longer a master of a god;it is a（7）.？？
？？We call only guess how（8）first learned that a fire was useful and what uses he made of it.By（9）a burning stick from fire which had been started naturally,he could make afire at his own“home”.He could keep the fire burning by adding more dry grass.1eaves and wood.The（10）the chief purpose of frightening animals away.He discovered,by some accident,that flesh roasted in front of a fire（11）better.Then he found that roasted flesh would keep longer,without going bad,（12）uncooked flesh.It must have been much later that Man learned to cook food by heating it with（13）water or with steam.He could not use such methods（14）he had learned how to make pots（15）holding water. ？？
()
A.made
B.produced
C.given
D.opened
()A.some
B.other
C.others
D.another
()A.So
B.Such
C.That
D.And
()A.by
B.on
C.with
D.in
()A.Man
B.the Man
C.he
D.Men
()A.at
B.to
C.towards
D.on
()A.invented
B.saw
C.discovered
D.known
()A.servant
B.employee
C.workmate
D.kid
()A.bringing
B.carrying
C.taking
D.holding
()A.before
B.until
C.when
D.after
()A.to
B.with
C.in
D.for
()A.meet
B.served
C.did
D.took
()A.than
B.when
C.after
D.before
()A.tasted
B.ate
C.much
D.is
()A.boiled
B.unboiled
C.boiling
D.cold
A、as a condition
B、for emphasis
C、as a command
D、for concession
| He was forced to leave Iceland because he had committed a murder, ____ he got into trouble. |
[ ] |
| A. where B. that C. during which D. for which |
B.normally open line contacts
C.thermal-overload protection
D.a momentary-contact start button
B.cooled to reduce its temperature
C.heated to reduce its density
D.heated to reduce its gravity
B.bacteria
C.chemica
D.oxidizing function
B.Building sealed tankers
C.Building pipelines
D.Building tankers
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