A．大动脉 B．中动脉 C．小动脉 D．微动脉 E．毛细血管心肌

—How does his aunt go to work?

—_________. [ ]

A. By his car

B. On her car

C. In her car

D. On his car

患者女，64岁。高血压病史10年。牙科建议拔除，拔除时麻醉剂最适合选用（）

A.2%含肾上腺素普鲁卡因

B.2%利多卡因

C.2%丁卡因

D.2%布比卡因

E.2%普鲁卡因

催化剂循环量大，烧焦时间短，碳堆积。

利用（）是保证鱼苗池溶氧的最好方法

A.浮游植物生物增氧

B.物理增氧

C.化学增氧化

D.机械增氧

田间持水率