單項(xiàng)選擇題
A.2/3 B.1 C.1.2 D.1.5
A.1mm B.2mm C.3mm D.4mm
A.k1=2，k2=1 B.k1=3，k2=2 C.k1=4，k2=3 D.k1=4，k2=2
A.1.5倍 B.2倍 C.0.5倍 D.3倍
A.1/4 B.1/2 C.3/4 D.1
A.π/4 B.π/3 C.π/2 D.π
A.5×10-7 B.5×10-6 C.5×10-5 D.5×10-4
A.2 B.1.5 C.1.8 D.3.2
A.0.4mm B.0.9mm C.4mm D.9mm
A.π/4 B.π/2 C.π D.2π
A.2λ B.3λ/2 C.λ D.λ/2
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