在尺寸公差带图中,公差带的宽度表示尺寸公差的大小。( )
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只有第一类线性相位滤波器可以设计低通、高通、带通、带阻滤波器。
A. 对
B. 错
“I think nothing I sell has effects which could be precisely described as ordinary.” In this sentence, the word "precisely" means ____.
A. simply
B. exactly
C. completely
What is not the image of Alan Austen in this story?
A. timid
B. skeptical
C. hesitant
D. rich
What does the sentence“He pushed open this door, as he had been told to do” suggest about Alan Austen?
A. It suggests that Alan Austen was very nervous and that if he had not been told to, he wouldn't have dared to enter the room.
B. It suggests that Alan Austen was very polite.
C. It suggests that Alan Austen was too shy to open the door.
D. It suggests that Alan Austen was unwilling to pushed open this door.