接地线线夹可夹接在表面油漆过的金属架或金属板上。（）
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In relation to the turning circle of a ship , the term kick means the distance（）.
A. around the circumference of the turning circle
B. gained at right angles to the original course
C. gained in the direction of the original course
D. or throw of a vessels stern from her line of advance upon putting the helm hard over
涂料按主要的组成成分和使用功能分为（）和（）两大类。
PAL制解码器中的同步检波器实质上是一个乘法器加一个低通滤波器。
A. 正确
B. 错误
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