哪些是目前常用的热切除物理能源()。
A.射频
B.激光
C.高强度聚焦超声
D.微波
E.以上均是
参考答案:E
—What are these?
— pears. [ ]
A. It's
B. They're
C. Their
要素、市场和环境是国外目标市场的三大类因素。