Yesterday, Mr. Green went to his hometown and visited the old house ________ he was born in.
A. which
B. where
C. what
D. it
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-What kind of movies do you prefer?-I prefer the movies ________ me something to think about.
A. which give
B. that gives
C. which gives
D. who gives
门禁系统最基本的功能包含(?)、实时监控、记录查询及报表打印等
A. 人员发卡
B. 门区设置
C. 进出权限
D. 时段控制
常用于与读卡模块连接的单片机有哪些种( )
A. 51单片机
B. AVR单片机
C. MSP430单片机
D. STM32单片机
在实际工程中，电控锁和门禁控制器可以共用一个电源
A. 对
B. 错
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