下列哪一项不是御书楼的藏书来源()
A、皇帝御赐
B、社会人士捐赠
C、自行购买
D、其他书院相赠
参考答案:D
“Would you like a cup of coffee or a glass of beer?” “____ will do, but milk is _____ popular with me.”
A.Neither, not
B.Both, more
C.Either, the most
D.All, the most
台额定一次电流为100A,额定电流比值为20,其额定二次电流为()。一台额定电流比为20:1的电流互感器,其额定二次电流为()。