药材紫苏叶的来源是（）
A.唇形科紫苏的叶
B.五加科紫苏的叶
C.蔷薇科紫苏的小叶
D.茄科紫苏的叶
E.石竹科紫苏的叶
参考答案：A
The old man said the accident ________careless driving，so a lot of money ________be paid by the driver.
A．was due to；was due to
B．due to；was due to
C．is due to；has due to
D．is due to；was due to
高炉耐火材料的选择原则是：根据高炉各部位的（），以延缓或防止破损。
A．各部位的热流强度
B．各部位的侵蚀情况
C．各部位的破损机理
