【单选题】波长为 l 的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为 ,则缝宽的大小为 ( )
【单选题】package foo; public class Outer { public static class Inner { } } Which statement is true?()
B.
An instance of the Inner class can be constructed with “new Outer.Inner()”.
C.
An instance of the Inner class cannot be constructed outside of package foo.
D.
An instance of the Inner class can be constructed only from within the Outer class.
E.
From within the package foo, and instance of the Inner class can be constructed with “new Inner()”.
【单选题】体液平衡中、细胞外液,最重要的阴离子是:
【单选题】波长为l的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为30º,则缝宽的大小为:
【单选题】package foo; public class Outer ( public static class Inner ( ) ) Which statement is true? ()
A.
An instance of the Inner class can be constructed with “new Outer.Inner ()”
B.
An instance of the inner class cannot be constructed outside of package foo.
C.
An instance of the inner class can only be constructed from within the outer class.
D.
From within the package bar, an instance of the inner class can be constructed with “new inner()”
【单选题】波长为l的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为30°,则缝宽的大小为 。
【单选题】波长为 l 的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为 q = p / 6 ,则缝宽的大小为
【单选题】设某函数的表达式F=A+B,假设A为高位,若用四选一数据选择器来设计,则数据端D 0 D 1 D 2 D 3 的状态是
【单选题】波长为 l 的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为 j = ± p / 6 ,则缝宽的大小为