中央处理单元的控制接口电路是微处理器与（）进行联系的部件
A、外部单元
B、主机内部其他单元
C、通讯单元
D、I/O单元
参考答案：B
She couldn't have entered the competition, but, for lack of confidence, she _______.[ ]
A. couldn't
B. didn't
C. doesn't
D. hadn't
仪表气控制范围（）Mpa
A.0.4-0.8
B.0.4-0.6
C.0.4-0.65
D.0.4-0.7
