宠物狗的牙齿分为[ ]
A．门齿、犬齿和臼齿
B．犬齿和臼齿
C．门齿和臼齿
D．门齿和犬齿
A
The comments which he made________marketing bothered his boss greatly.[ ]
A. being concerned
B. concerned
C. be concerned
D. concerning
由于生产过程设备的技术性能和自动化程度越来越高，企业生产已逐步转向由（）来完成。
