[判断]  星形连结的三相对称负载，接于三相对称电源上，线电压与相电压之比为。data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACMAAAAhCAYAAABTERJSAAACS0lEQVRYR+3WS8iMcRTH8c9LKSE7C1IUUkIoG5eUhSwoSso9KSUkC4pyzSXXhEIuYUM2WMiChdvGRlJKSqRsZEGEcuvUXx6vmXn+z0xTr3qfmmZqzuX7P+d3zv/p0IWeji7EolmYn/iA+M59duJgI+NWYJr1rcvTTMDJmInNuSXJtWsGZgse4HZukly7ZmBCJz066WUIVuAHvmA0HuMM3rYLpg8+8pfwJ2A6juJzStwbuzAOy/AqB6hqZWZhRGEqemE3BmIjXheSTsUdrMfhdsBE0At4lIL3TEKeiwV4Wkg6CfexCXvaARN6ya3mEhzDnFyx5waOgw1OLVmcccrQVoCE0NekBVnqVgVmaQp+riRqAETLoiKhlyzxRswqMOexFS/rwIRgY6QnJoCYruyxrgpTRS+DcAAPcaIw8g2LmluZMWmprS1t/B+D8LmEqGhckN/KfHNh1qX2XC0LWPi/P05jOObjWZlvPZjjaYO+SQGuY1GNqYhdchJncQTfCwljC8deWom4XOM+q9Sm8YgtG89X7E2/6+llNq5hAw51gumHOFS0q6XKRJJ4GRqLaemzrcaxhmIh9if4oskoXMGNtKXjcJUq89u4L15gAHbgFu7WiBRtnoeYnlP4lGxi6e3DMKzG8zKQstG+WQjUSOjx30isSm16l1oTl+RFvM8BKYOJ2zjeTbZXXI65uf+xa3TiKHHc0JfTpDSdJNexbM/EaM/Ak9yArdiVwcT+WN5Kgiq+ZTBTcK9KwFZsy2BaiV3ZtxumXsm6K/NfVOYX0g5nIhCvq4YAAAAASUVORK5CYII=