铝芯聚氯乙烯绝缘电线的代号是（）。
A、BV
B、BVR
C、BVVB
D、BLV
参考答案：D
I would like _____ you to my birthday party, but I was busy and forgot to call you. [ ]
A. to invite
B. inviting
C. to have invited
D. having invited
用刻度尺测量某物体的长度为16.25cm，其中准确值是______，估计值是______，所用刻度尺的最小刻度是______．
