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【单选题】
已知ADC0809管脚ADDA、ADDB、ADDC作为8选1通道地址输入端，选择转换的输入通道。若ADDA、ADDB、ADDC分别为1、0、0，则选中（ ）引脚的输入电压进行A/D转换。A.
IN2。
B.
IN4。
C.
IN1。
D.
IN7。
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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】浇口应开设在塑件壁厚（ ）处，以减少流动阻力，并有助于补缩。A ．较厚 B ．较薄 C ．均匀 D ．以上都不
A.
．较厚
B.
．较薄
C.
．均匀
D.
．以上都不
【单选题】We need to ______ the purpose of the experiment again.
A.
clarify
B.
cling
C.
claim
D.
clap
【单选题】A stamp design includes several elements required for it to ________ its purpose satisfactorily.
A.
adapt
B.
apply
C.
accomplish
D.
acquire
【单选题】The edge of the wise over the unwise lies in their tendency to _______ about the purpose of their life.
A.
promote
B.
account
C.
insist
D.
speculate
【简答题】It was a m struggle, a death march to the end. ( completely stupid and without any purpose )
【单选题】Why did Polly and Digory begin their adventures?
A.
Because of the bad weather.
B.
Because of the hot weather.
C.
Because they were in a good mood.
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