三分裂导线
参考答案:
由三根子导线构成的分裂导线。
---Could you tell me how to improve spoken English?
---Well, just take every chance to practise ______and don't be shy.
A. speak
B.to speak
C. speaking
D.spoke
缴费单位的()等社会保险登记事项发生变更时,应当依法向原社会保险登记机构申请办理变更社会保险登记。
A.单位名称
B.住所或地址
C.主管部门
D.开户银行账号