长度1.251×106μm的有效数字是 ,测量此数据的仪器的最小刻度是 。
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A) chemistry B) construction C) physiology D) constitution
A. chemistry
B. construction
C. physiology
D. constitution
A) formation B) explosion C) eruption D) propulsion
A. formation
B. explosion
C. eruption
D. propulsion
A) put in B) take over C) make up D) set off
A. put in
B. take over
C. make up
D. set off
A) this B) such C) so D) either
A. this
B. such
C. so
D. either