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1.CSS
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A.
height
B.
line-height
C.
padding-top,padding-bottom
D.
margin-top,margin-bottom
2.
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A. target = _
blank
B. target =
_self
C. target = _
parent
D. target = _
top
3.
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div
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A
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position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
B. position:absolute;top:50%;margin: 0 auto;
C. position:absolute;top:50%;left:50%;margin: -50%,-50%;
D. margin: 0 auto; transform:translateY(50%);
4.rgba()
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opacity
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A. rgba()
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opacity
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B.
opacity
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C
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rgba()
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D
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opacity
鐨勫�间负
1
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5.
var a={value:1};
var b = a;
b.value = 2;
a.value = 3;
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b.value
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A.
undefined
B.
1
C.
2
D.
3
6. parseFloat(
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12.34.5
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)
鐨勫�间负
()
A
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NaN
B. 12
C. 12.34
D
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34.5
7.
var a= "11" + 2 - "1" + 3;
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a
鐨勫�间负锛堬級
A
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NaN