皮皮学，免费搜题
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搜题
【单选题】
单片机每个并行I/O端口包括几条I/O口线A.
4
B.
8
C.
16
D.
32
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】鳏寡孤独废疾者皆有所养。
A.
Helpless widows and widowers, the lonely, as well as the sick and disabled,are well cared for.
B.
Widows, widowers, orphans, childless olds, the disabled, and the sick can all have a source of livelihood.
C.
Those who have no kin and cannot support themselves as well as those who are sick or handicapped should all be properly taken care of.
【简答题】西湖龙井是绿茶的一种。（ ）