一般水平管道应有不小于()的坡度。
A、1/1000
B、1/100
C、2/1000
D、2/100
参考答案:C
To make _____ matters worse, Mr, Green lost his job last year. So the family are struggling to make _____ ends meet.
A∕ , the B the, ∕ C ∕, ∕ D the, the
图样尺寸数字一般注在尺寸线的中间部位。在相互平行的尺寸线上填写数字,应使相邻的数字彼此错开。( )