以昼夜分阴阳，后半夜为（）
A．阴中之阳
B．阳中之阴
C．阳中之阳
D．阴中之阴
E．阴中之至阴
参考答案：A
Tom has been here ______ just one year, but his father has worked here ______ ten years ago.[ ]
A. since; for
B. since; since
C. for; since
D. for; /
物料储存时货垛码放应注意什么？
