更多"At present, there is a ______ of ir"的相关试题:
[单项选择]At present, there is a ______ of iron and steel and more must be produced.
A. Limit
B. loss
C. poverty
D. scarcity
[单项选择]An iron and steel works, with some satellite factories, ______ to be built there.
A. are
B. is
C. will
D. need
[单项选择]An iron and steel works, with several satellite factories,（）in that city now.
A. is built
B. is being built
C. were built
D. are being built
[单项选择]Iron and steel are flexible. But they are not as flexible ______ rubber.
A) as C) to
B) for D) by
A. Iron and steel are flexible. But they are not as flexible ______ rubber.
B. as
C. for
D. to
E. by
[单项选择]Steel is an alloy composed （） of iron and carbon.
A. primarily
B. traditionally
C. carefully
D. partially
[单项选择]Steel works are encouraged to purchase ______ iron so as to reduce the consumption of natural resources.
A. scrap
B. scrape
C. scratch
D. snap
[单项选择]Steel is _____ from iron which contains a certain amount of carbon.
A. composed
B. consisted
C. made
D. produced
[单项选择]Iron and steel expands when heated and_______when cooled.
A. shrinks
B. contracts
C. condenses
D. compresses
[单项选择]铸铁(cast iron)与碳钢(carbon steel)的区别在于有无______。（）
A. 莱氏体(ledeburite)
B. 珠光体(pearlite)
C. 铁素体(ferrite)
[单项选择]English iron smelters and English iron manufacturers were both opposed to _______.
A. high import taxes on American pig iron
B. the growth of iron manufacturing in America
C. the shipping of iron products to America
D. selling English wool to the colonists
[单项选择]Graham-Steel杂音见于
A. 二尖瓣狭窄
B. 主动脉瓣狭窄
C. 二尖瓣关闭不全
D. 主动脉瓣关闭不全
E. 相对性三尖瓣关闭不全
[单项选择]What is our present situation like
A. Like war, revolution and depression.
B. Like natural disaster.
C. Continuation of our present state.
D. A state where long-range planning is essential.
