测定水中三氯乙醛的吡唑啉酮分光光度法(HJ/T50—1999)的最低检出限为()。
A.0.02μg/L
B.0.02mg/ml
C.0.02mg/L
参考答案:C
What a table! I’ ve never seen such a thing before. It is ______ it is long.
A.half not as wide as
B.wide not as half as
C.not half as wide as
D.as wide as not half
语言在历史长河的沉淀中,积累下了不少固定说法。以下关于数字“五”的固定所指,错误的是()。
A.“五毒”是指蝎、蛇、蜈蚣、壁虎、蟾蜍
B.“五官”是指人的耳、目、口、鼻、眉
C.“五谷”是指稻、黍、稷、麦、豆
D.“五彩”是指蓝、黄、红、白、黑