From 2013 to 2018, How much is the goods trade volume between China and countries and regions along the Belt and Road()
A. More than 5 trillion U.S.D
B. More than 6 trillion U.S.D
C. More than 7 trillion U.S.D
D. More than 8 trillion U.S.D
查看答案
如果游标卡尺的游标分度为20,那么其精度应为()
A. 0.05mm
B. 0.02mm
C. 0.1mm
D. 0.01mm
本次实验我们选择()进行杨氏模量的测量研究
A. 拉伸法
B. 梁弯曲法
C. 振动法
D. 内耗法
用精度0.02mm游标卡尺测量时,读数为10.31mm,该读数对吗()