金瓷基底冠进行氧化处理时,理想的氧化层应为多厚()。
A.0.05~0.1μm
B.0.1~0.2μm
C.0.2~2μm
D.2~2.5μm
E.2.5~3μm
参考答案:C
The lack of money forced them to________their research.
A.abandoned
B.abandoning
C.abandon
D.be abandoned
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