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【单选题】
Which statement about style priority is incorrect? ( )
A.
Css styles directly defined on tags have the highest level.
B.
Internal styles have lower priority than inline styles.
C.
External style sheets have the lowest level.
D.
When the attributes in the style conflict, the preset comes into effect.
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举一反三
【单选题】The round dot before the unordered list item <li> can be removed by ( ) .
A.
clear:both;
B.
font-style:none;
C.
list-style:none;
D.
list-style:normal;
【多选题】(Multiple-choice question) In css, what are the common methods to clear floating? ( )
A.
Add an empty block element afterthefloating element.
B.
Add an empty line element after the floating element.
C.
Set the height of the parent element of the floating element.
D.
Set to clear floating by means of pseudo class.
E.
Set floating for parent elementof the floating element.
【多选题】(Multiple-choice question)Which options are right about floating element characteristics?
A.
Floating element is separated from the document flow.
B.
The float:top willset the element to float upwards.
C.
After the line element is set to float, the line element will automatically turn into a block element.
D.
Floating elements can not hold up the block that contains it.
【单选题】About the characteristics of floating elements, which of the following statements is wrong? ( )
A.
If the width of the container box is less than the sum of the widths of all floating elements, the floating elements will wrap. At this time, if the heights of the floating elements are different, a blank block will appear.
B.
Floating elements occupy the original space.
C.
The text will surround the floating element when the floating element is with the text.
D.
Floating can only float left and right, not up and down.
【单选题】Which option is wrong about float? ( )
A.
float:left
B.
float:center
C.
float:right
D.
float:none
【单选题】Which of the following is not a floating element characteristic? ( )
A.
Floating elements will be automatically set to block elements for display.
B.
A floating element is in the same position in the vertical direction as when it is not defined as floating.
C.
The floating element is horizontal, and it will be as close as possible to the edge of its parent element.
D.
Block elements will not drill under floating elements and will not be covered by floating elements.
【单选题】Which of the following does not belong to the padding attribute? ( )
A.
padding-left
B.
padding-head
C.
padding-bottom
D.
padding-right
【单选题】The correct statement about padding:20px 30px 40px is ( ).
A.
paddings: 20px space up, 30px space down, 40px space left and right
B.
paddings: 20px space up, 40px space down, 30px space left and right
C.
margins: 20px space up, 30px space down, 40px space left and right
D.
margins: 20px space up, 40px space down, 30px space left and right