三相交流电度表的内部有（）套测量机构。
A.1
B.2
C.3
D.2或3
参考答案：D
妊娠152天。检查：宫底脐下一横指，需终止妊娠，常用哪种方汉
A．水囊引产B．钳刮术C．吸宫术D．利凡诺引产E．缩宫素静点
After completing a commercial transaction, （） will execute the transfer of goods from the seller to the buyer in the most-effective manner.
A.Logistics
B.Supply chain
C.Virtual warehouse
D.Transportation
