比0.1大、比0.4小的小数只有2个.______.(判断对错)
比0.1大、比0.4小的小数,可以是一位小数、两位小数、三位小数…,所以有无数个小数.
故答案为:×.
用测回法测水平角时,第一步测量是()。
A.以正镜进行观测
B.以倒镜进行观测
C.正倒镜都可
D.以上都不是
In order to detect rot in manila lines,you should().
A.feel the surface of the line for broken fibers
B.measure the reduction in circumference of the line
C.observe any mildew on the outer surface
D.open the strands and examine the inner fibers