固定钢丝绳的绳卡.必须按规定使用,最后一个绳卡距绳头的长度不应小于()mm。
A.100
B.120
C.130
D.140
参考答案:D
the engineer are so busy that they have zero time for outdoor sports activities, __________they have the interest.
A. wherever
B. Whenever
C.even if
D.as if
能够惟一确定Internet上每一台计算机位置的是()。