矩阵监控主机没有的功能是（）
A.切换
B.控制
C.巡检
D.显示
参考答案：D
《中国药典》规定茵陈的采收期有几个（）
A.1个
B.2个
C.3个
D.4个
E.全年均可采挖
Sally worked late in the evening to finish her report _______ her boss could read it first next morning.
A．so that
B．because
C．before
D．now that
