（）是专门绘制墨线线条图的工具，可画出精确的且具有相同宽度的线条。
A.针管笔
B.HB铅笔
C.2B铅笔
D.6H铅笔
参考答案：A
什么叫雷德饱和蒸汽压？
Kangkang has learned over ________ English words for two years.
A. five thousand, eight hundreds and sixty-five
B. five thousands, eight hundred and sixty-five
C. five thousand, eight hundred and sixty-five
