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【单选题】
单片机输出的信号为_______电平A.
RS-232C
B.
TTL
C.
RS-449
D.
RS-232
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反馈参考答案：
举一反三
【简答题】句型转换。 1.He started to learn the piano when he was five years old.(同义句) He started _____ the piano at _____ _____ _____five. 2.He was first in the competition. (同义句) He _____ _____ _____ _____in the co...
【单选题】He regretted having started the project.
A.
He started the project.
B.
He is starting the project.
C.
He had started the project.
D.
having started the project.
【单选题】106某带链的队列初始状态为front=rear=NULL。经过一系列正常的入队与退队操作后,front=rear=10。该队列中的元素个数为
A.
0
B.
不确定
C.
1
D.
1或0
【单选题】某带链的队列初始状态为front=rear=NULL。经过一系列正常的入队与退队操作后,front=rear=10。该队列中的元素个数为
A.
0
B.
不确定
C.
1
D.
1或0
【简答题】句型转换。 1. He started to learn the piano when he was five years old. He started _____ the piano at the _____ of five. (同义句) 2. He was first in the competition. He _____ first prize in the competition. (...
【单选题】He insisted that nothing ______ till he arrived. A.must be started B.ought to be started C.could be started D.should be started
A.
must be started
B.
ought to be started
C.
could be started
D.
should be started
【单选题】某带链的队列初始状态为 front=rear=NULL。经过一系列正常的入队与退队操作后,front=rear=10。该队列中的元素个数为
A.
0
B.
1
C.
不确定
D.
1或0
【单选题】某带链的队列初始状态为 front=rear=NULL。经过一系列正常的入队与退队操作后,front=rear=10。该队列中的元素个数为
A.
不确定
B.
1或0
C.
1
D.
0
相关题目：
【单选题】106某带链的队列初始状态为front=rear=NULL。经过一系列正常的入队与退队操作后,front=rear=10。该队列中的元素个数为
A.
0
B.
不确定
C.
1
D.
1或0
参考解析：
知识点：
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