金融市场上主要的资金供应者是()。
A.企业
B.家庭
C.政府
D.中央银行
参考答案：B
解析：家庭是金融市场上主要的资金供应者。参见教材P1
He________ full marks, but he was so careless as to make a spelling mistake.[ ]
A. must have gained
B. might gain
C. could have gained
D. must gain
什么叫高压开关设备的内绝缘？它的电气强度由什么决定？它的主要特点是什么？
