隔离开关可以拉合负荷电流和接地故障电流。
参考答案:错
Read and write.快帮大头蛙 完成下列句子吧!
1. I want to buy a new pair of (袜子).
2. Would you like (一些) juice ?
3. This bag is (太沉了).
4. They (玩) basketball yesterday.
5. There are many (运动员) in a team.
以下哪种风险往往使企业付出高额花费,甚至丢失订单和客户,同时也会对整个供应链产生影响( )
A.对外包依赖控制程度
B.外包可靠性风险
C.可能影响企业的核心业务
D.由于第三方物流服务商提供较差的服务或提高价格而对企业造成的损失