输入行列式应单击“公式”工具栏中的（）。
A.围栏模板
B.符号工具板
C.上下划线模板
D.杂项符合
参考答案：A
The garden _____ while they were away from here.
A．took good care of
B．was taken good care
C．was taken good care of
D．was taking good care of
能纳气平喘的药物是（）
A.核桃肉
B.蛤蚧
C.紫河车
D.冬虫夏草
E.磁石
