交联聚乙烯绝缘电力电缆,线芯最高工作温度是()
A.60℃
B.70℃
C.65℃
D.90℃
参考答案:D
Going to _______ Taiwan for holiday is _______ enjoyable and exciting experience for most people from the mainland of China.
A.不填; 不填
B.a ;the
C.不填; an
D.the; 不填
主张力机导线轮直径不宜小于导线直径的()倍。
A、40;
B、30;
C、35;
D、45。