在尺寸公差带图中，若上极限偏差为正值，则上极限偏差线一定在零线的上方。( )
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在尺寸公差带图中，公差带的宽度表示尺寸公差的大小。( )
A. 对
B. 错
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
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