第一题1.14um= mm = dm = cm = m =nm第二题 74.76nm= cm = km第三题 45.678um= mm = cm = m = km

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第一题1.14um= mm = dm = cm = m =nm第二题 74.76nm= cm = km第三题 45.678um= mm = cm = m = km

第一题1.14um= mm = dm = cm = m =nm第二题 74.76nm= cm = km第三题 45.678um= mm = cm = m = km
第一题1.14um= mm = dm = cm = m =nm
第二题 74.76nm= cm = km
第三题 45.678um= mm = cm = m = km

第一题1.14um= mm = dm = cm = m =nm第二题 74.76nm= cm = km第三题 45.678um= mm = cm = m = km
74.76nm=7.476*10∧-6cm=7.476*10∧-11km.
45.567um=4.5678*10∧-2mm=4.5678*∧10-3cm=4.5678*10∧-5m=4/5678*10∧-8km.