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【简答题】
设有粉料粒度为5μm,若经2h烧结后,x/r=0.1。如果不考虑晶粒生长,若烧结至x/r=0.2,并分别通过蒸发—凝聚、体积扩散、黏性流动、溶解—沉淀传质,各需多少时间?若烧结8h,各个传质过程的颈部增长x/r又是多少?
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举一反三
【判断题】That many East African countries actively promote the abandonment of tribal languages in favor of Swahili shows that civil strife decrease language diversity.
A.
正确
B.
错误
【单选题】Civil strife and bloodshed made the people of that country shudder .
A.
shovel
B.
shrug
C.
shiver
D.
shock
【单选题】Civil strife and bloodshed made the people of that country________
A.
shudder
B.
stupendous
C.
suicidal
D.
sink
【单选题】Choose the word that can replace the underlined part in the sentence without changing its orignal meaning. Civil strife and bloodshed made the people of that country shudder .
A.
shiver
B.
shovel
C.
shrug
D.
shock
【简答题】货币供给与货币供应量
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