东北风8级用下列哪个符号表示( )
A.
B.
C.
D.
有风的表示方法可推断A、C、D选项中符号分别表示北风6级、北风8级、东风6级,B选项中的符号表示东北风8级.
故选:B.
It’s a ____coincidence that the day before his retirement, my English teacher will have been teaching
for a total of forty years.
A. serious
B. cautious
C. curious
D. previous
由( )可以看出机器零件尺寸精度的高低。
A.基本尺寸 B.最小极限尺寸C.尺寸公差 D.下偏差