一般情况下,盲板直径Ф1000mm的盲板,厚度宜选8mm。
参考答案:对
We live day by day, but in the great things, the time of days and weeks____ so small that a day
is unimportant. [ ]
A. is
B. are
C. has been
D. have been
为保证建筑制品、构配件等有关尺寸间的统一与协调,特规定了()及相互之间的关系。
A.标志尺寸
B.定位尺寸
C.构造尺寸
D.实际尺寸
E.定形尺寸