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【简答题】
对于金属而言,结晶时形核通常有 和 两种方式;通常均匀形核所需的过冷度约为 ;非均匀形核所需的过冷度约为 。
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皮皮学刷刷变学霸
举一反三
【简答题】人类23对染色体分为____个组,其中X染色体属于____组,Y染色体属于____组。
【单选题】When a supplier's shipments start arriving _____late, incomplete or damaged, it's time to consider looking for a new one.
A.
steadily
B.
sensibly
C.
exactly
D.
consistently
【单选题】When the passion and drive ebb, ______.
A.
it's time to show the importance of one's full energy
B.
it's hard to move on again
C.
it's time to test one's work ability
D.
it's likely that high-level person won't give up