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【单选题】
PCB板铜箔厚度为35um,如设计通过为:3.2A的电流,则导线最小宽度应为:( )。
A.
2.1mm
B.
1.8mm
C.
1.5mm
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举一反三
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B.
R(z)是波阵面的曲率半径,而q称为高斯光束的复曲率半径
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【单选题】Why was Danny shocked after his grandparents died?
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【简答题】句型转换（5%） 小题1:These are my grandparents. (变一般疑问句) _______ these ______ grandparents? 小题2:Is this his picture? (作肯定回答) _______, ______ is. 小题3:The tape player is in the room . (对划线部分提问) _______ ________...
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相关题目：
【多选题】关于普通球面波与高斯光束的异同点,下列说法正确的是:
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前者的R(z)与后者的q参数含义不同,但变化规律相同
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