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【单选题】
P1&=~0xB1;的作用是:A.
P1.6、P1.3、P1.2口和P1.1被清零，其余位保持不变。
B.
P1.6、P1.3、P1.2口和P1.1被置1，其余位保持不变。
C.
P1.7、P1.5、P1.4口和P1.0被清零，其余位保持不变。
D.
P1.7、P1.5、P1.4口和P1.0被置1，其余位保持不变。
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】大空间且人员较多或有必要集中进行温湿度控制的空气调节区域，宜采用的空调系统是：[2007年第80题]
A.
全空气系统
B.
变制冷剂流量多联分体系统
C.
风机盘管系统
D.
诱导器系统
【简答题】I could not persuade him to accept it, _____ make him see the important of it. (A) if only I could not (B) no more than I could (C) or I could not (D) nor could I
【单选题】I could not persuade him to accept it,______ make him see the importance of it.
A.
if only I could not
B.
no more than I could
C.
or I could not
D.
nor could I
【简答题】I could not persuade him to accept it, _____________ make him see the importance of it. [A] if only I could not [B] no more than I could [C] or I could not [D] nor could I
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