国内异地引进（）应先到动物防疫监督机构办理审批手续。
A.种用动物
B.肉用动物
C.观赏动物
参考答案：A
A: Firstly, allow me to introduce myself. My name is John Brown, manager of the company. B: ______
A．You must be mistaken. I don't know you at all.
B．Hello, Brown, I haven't seen you for ages.
C．Very nice to see you, Mr. Brown.
D．Hi, John! Welcome to our company.
如图为某举重运动员在0.5s内由支撑到起立将杠铃举起过程中拍摄的两张照片，杠铃的质量为100kg，则杠铃重为 N．已知照片中杠铃的实际直径是40cm，根据照片可算出该运动员在上述过程中对杠铃做功的平均功率约为 W．（g取10N/kg）
