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【简答题】
( )是指改变操作条件以达到消除对一个潜在领域工作的需要。 A预先作用原 B预先反作用原理 C事先防范原理 D等势原理
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举一反三
【单选题】51单片机的 VCC(40)引脚是( )引脚。
A.
接地
B.
主电源+5 V
C.
备用电源
D.
访问片外存储器
查看完整题目与答案
【单选题】She likes apples;so ________ I.
A.
am
B.
do
C.
is
D.
does
查看完整题目与答案
【单选题】AT89C51单片机的VCC引脚是几号引脚
A.
1
B.
20
C.
10
D.
40
查看完整题目与答案
【单选题】VI 执行结束后,数值和数值2显示控件的值是什么?
A.
10和15
B.
15和10
C.
15和15
D.
0和15
查看完整题目与答案
【单选题】51单片机的Vcc(40)引脚是( )引脚。
A.
主电源+5V
B.
接地
C.
备用电源
D.
复位
查看完整题目与答案
【单选题】0207A30. VI执行结束后,数值和数值2显示控件的值是什么?
A.
10和15
B.
15和10
C.
15和15
查看完整题目与答案
【单选题】Mary doesn't like apples, she likes bananas.
A.
but
B.
so
C.
and
查看完整题目与答案
【简答题】Lily is a healthy girl. She likes to eat vegetables and fruits every day. She has eggs, milk, bananas and bread for breakfast. For lunch, she likes sandwiches, carrots and apples. And she eats chicken...
查看完整题目与答案
【简答题】阅读理解。 Jack likes eggs, bananas and apples. So every day, he has two eggs, one apple, a cup of milk and some bread for breakfast.  He likes vegetables a lot. For lunch, he has bananas, some chicken and...
查看完整题目与答案
【单选题】2 PLC中L的含义是( )
A.
Line
B.
Local
C.
Logical
D.
Load
查看完整题目与答案
相关题目：
【单选题】51单片机的 VCC(40)引脚是( )引脚。
A.
接地
B.
主电源+5 V
C.
备用电源
D.
访问片外存储器
查看完整题目与答案
【单选题】She likes apples;so ________ I.
A.
am
B.
do
C.
is
D.
does
查看完整题目与答案
【单选题】AT89C51单片机的VCC引脚是几号引脚
A.
1
B.
20
C.
10
D.
40
查看完整题目与答案
【单选题】VI 执行结束后,数值和数值2显示控件的值是什么?
A.
10和15
B.
15和10
C.
15和15
D.
0和15
查看完整题目与答案
【单选题】51单片机的Vcc(40)引脚是( )引脚。
A.
主电源+5V
B.
接地
C.
备用电源
D.
复位
查看完整题目与答案
【单选题】0207A30. VI执行结束后,数值和数值2显示控件的值是什么?
A.
10和15
B.
15和10
C.
15和15
查看完整题目与答案
【单选题】Mary doesn't like apples, she likes bananas.
A.
but
B.
so
C.
and
查看完整题目与答案
【简答题】Lily is a healthy girl. She likes to eat vegetables and fruits every day. She has eggs, milk, bananas and bread for breakfast. For lunch, she likes sandwiches, carrots and apples. And she eats chicken...
查看完整题目与答案
【简答题】阅读理解。 Jack likes eggs, bananas and apples. So every day, he has two eggs, one apple, a cup of milk and some bread for breakfast.  He likes vegetables a lot. For lunch, he has bananas, some chicken and...
查看完整题目与答案
【单选题】2 PLC中L的含义是( )
A.
Line
B.
Local
C.
Logical
D.
Load
查看完整题目与答案