智能变电站的二次电压并列功能在母线合并单元中实现。
A. 正确
B. 错误
合同的变更、解除、终止或者无效，不影响仲裁协议的效力。
A. 正确
B. 错误
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
A. Cranes are more difficult to secure for sea
B. The spotting area of the conventional gear is larger
C. A crane operator requires more training than the winch operator of a yard and stay rig
D. The yard and stay rig is more flexible in its ability to handle a wider variety of cargoe
顾客在购买商品时所用的付款方式为信用卡，退货时应退（）
A. 现金
B. 面值卡
C. 信用卡
D. 一卡通
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