较先进的外科手术器械包括：（）
A.高频电刀
B.冷冻手术装置
C.显微外科设备
D.骨肠道吻合器
E.激光治疗
参考答案：A, B, C, D, E
The results of the medical checkup suggested that my father _____ in poor health, so the doctor suggested that he _____ smoking and take more exercise.[ ]
A. was; gave up
B. be; should give up
C. should be; gave up
D. was; give up
三一混凝土泵车中的分配阀形式主要采用（）
