测量的标准是（）
A.法则
B.数量
C.参照点
D.量表
参考答案：A
—Have you heard from Janet recently?
—No, but I ______ her over Christmas.
A．saw
B．will be seeing
C．have seen
D．have been seeing
生产30%乙酰甲胺磷乳油混配温度是多少？
