--You've given us a wonderful Chinese dinner, Mrs. Wang. --()
A. Come again when you are free
B. Oh,I don’t think Icooked very well.
C. It’s not necessary for you to say so.
D. I’m glad you enjoyed it.
由Internet端口号分配机构(IANA)管理的端口范围是()
A. 1~1023
B. 1024~5000
C. 5000~8000
D. 8000~65535
为了正确地读取8051的P1口引脚的状态值,应该先向它()
企业可委托具有相应资质的中介机构对供应商进行资信调查。
A. 正确
B. 错误