（）命令可以方便地查询指定两点之间的直线距离以及该直线与X轴的夹角。
A.点坐标
B.距离
C.面积
D.面域
参考答案：B
Sherlock Holmes________ to Doctor Watson and therefore others couldn't hear what they
were talking about.[ ]
A. persuade
B. lie
C. whispered
D. deliver
羌活胜湿汤的组成药物中不含（）
A.川芎
B.防风
C.白芷
D.藁本
E.蔓荆子
