我国秦川牛体形庞大，毛色枣红，鞍部发达，肌肉丰满。( )
参考答案：对
Mr．Green didn’t understand ________ made his daughter so absent-minded this morning．
A．how that was
B．what was it
C．why it was that
D．what it was that
高频开关的基本功能？
