对于一个绕组有分接开关的多绕组变压器，可只测量带分接开关绕组对一个绕组所有分接头的变压比，而对第三绕组只测（）。
参考答案：额定变压比
根据句意及所给首字母提示完成句子。
1. —What w _____ you do if you wanted to make friends with a new student?
—I'd introduce myself.
2. This cake looks d _____ from that one.
3. Don't be w_____ about me. I'm feeling better now.
4. If I w _____ a millionaire, I'd send money to "Animal Helpers " .
5. I hear that you have won m _____ of dollars.
8位二进制数能表示十进制数的最大值是（）。
A.256
B.255
C.248
D.192
