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【单选题】
Which of the following statements about animation property is correct? ( )
A.
The animation-timing-function specifies the speed curve of animation, its default value is linear, which means that the speed of animation is the same from beginning to end.
B.
The animation-duration specifies the seconds or milliseconds it takes for animation to complete a cycle, its default value is 0.
C.
The animation-iteration-count specifies the number of times the animation is played, its default value is infinite, which means playing animation infinitely.
D.
The animation-delay defaults to 0, which means animation is paused.
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参考答案：
举一反三
【单选题】In css3, the ( ) attribute specifies the style to be applied to the element when the animation is not playing (when the animation is finished, or when the animation does not start playing with a dela...
A.
animation-direction
B.
animation-play-state
C.
animation-fill-mode
D.
animation-delay
【单选题】Now, a cube with a side length of 300px is rotated around the center of the cube. Which of the following statements is correct? ( )
A.
transform-origin:50% 50% 50%;
B.
transform-origin:50% 50% -50%;
C.
transform-origin:50% 50% 150px;
D.
transform-origin:50% 50% -150px;
【单选题】Which of the following attributes can sort flexible sub-elements? ( )
A.
flex
B.
order
C.
flex-grow
D.
flex-shrink
【单选题】Which of the following attributes can make the flex container display on multiple lines? ( )
A.
flex-wrap
B.
flex-flow
C.
flex
D.
flex-direction
【单选题】If you want to set the alignment of flexible sub-elements, which of the following statements is correct? ( )
A.
Set for flexible sub-elements justify-content: space-between
B.
Set for flexible element justify-content: space-between
C.
Set for flexible sub-elements align-content: space-between
D.
Set for flexible element align-content: space-between
【多选题】(Multiple-choice question) Which of the following items belong to display attribute values? ( )
A.
block
B.
inline
C.
table
D.
flex
E.
inline-flex
【单选题】What is the correct statement about flow-grow? ( )
A.
Defines the expansion ratio of sub-elements, and its default value is 1.
B.
Defines the shrinkage ratio of sub-elements, and its default value is 0.
C.
Defines the expansionratio of sub-elements, and its default value is 0.
D.
Defines the shrinkage ratio of sub-elements, and its default value is 1.
【多选题】For flexible box, what are the attributes of flexible sub-elements? ( )
A.
order
B.
flex-direction
C.
flex-grow
D.
flex-shrink
E.
flex-flow
【单选题】To center the element with class name con vertically in the element with class name box, what codes should be set at the underlines? ( )<style>.box{width:100%;height:200px;display:_______;_____...
A.
Fill in flexat the first underline, fill in align-items at the second underline.
B.
Fill inflexat the first underline, fill inalign-contentat the second underline.
C.
Fill inblockat the first underline, fill inalign-itemsat the second underline.
D.
Fill inblockat the first underline, fill inalign-contentat the second underline.
【多选题】(Multiple-choice question) Which of the following statements about HTML5 are correct? ( )
A.
The declaration of HTML5 is <!DOCTYPE html>.
B.
HTML5's declaration does not need to introduce DTD.
C.
HTML5' s declaration is more concise than HTML4' s.
D.
HTML5 is based on SGML.
相关题目：
【单选题】In css3, the ( ) attribute specifies the style to be applied to the element when the animation is not playing (when the animation is finished, or when the animation does not start playing with a dela...
A.
animation-direction
B.
animation-play-state
C.
animation-fill-mode
D.
animation-delay
【单选题】Now, a cube with a side length of 300px is rotated around the center of the cube. Which of the following statements is correct? ( )
A.
transform-origin:50% 50% 50%;
B.
transform-origin:50% 50% -50%;
C.
transform-origin:50% 50% 150px;
D.
transform-origin:50% 50% -150px;
【单选题】Which of the following attributes can sort flexible sub-elements? ( )
A.
flex
B.
order
C.
flex-grow
D.
flex-shrink
【单选题】Which of the following attributes can make the flex container display on multiple lines? ( )
A.
flex-wrap
B.
flex-flow
C.
flex
D.
flex-direction
【单选题】If you want to set the alignment of flexible sub-elements, which of the following statements is correct? ( )
A.
Set for flexible sub-elements justify-content: space-between
B.
Set for flexible element justify-content: space-between
C.
Set for flexible sub-elements align-content: space-between
D.
Set for flexible element align-content: space-between
【多选题】(Multiple-choice question) Which of the following items belong to display attribute values? ( )
A.
block
B.
inline
C.
table
D.
flex
E.
inline-flex
【单选题】What is the correct statement about flow-grow? ( )
A.
Defines the expansion ratio of sub-elements, and its default value is 1.
B.
Defines the shrinkage ratio of sub-elements, and its default value is 0.
C.
Defines the expansionratio of sub-elements, and its default value is 0.
D.
Defines the shrinkage ratio of sub-elements, and its default value is 1.
【多选题】For flexible box, what are the attributes of flexible sub-elements? ( )
A.
order
B.
flex-direction
C.
flex-grow
D.
flex-shrink
E.
flex-flow
【单选题】To center the element with class name con vertically in the element with class name box, what codes should be set at the underlines? ( )<style>.box{width:100%;height:200px;display:_______;_____...
A.
Fill in flexat the first underline, fill in align-items at the second underline.
B.
Fill inflexat the first underline, fill inalign-contentat the second underline.
C.
Fill inblockat the first underline, fill inalign-itemsat the second underline.
D.
Fill inblockat the first underline, fill inalign-contentat the second underline.
【多选题】(Multiple-choice question) Which of the following statements about HTML5 are correct? ( )
A.
The declaration of HTML5 is <!DOCTYPE html>.
B.
HTML5's declaration does not need to introduce DTD.
C.
HTML5' s declaration is more concise than HTML4' s.
D.
HTML5 is based on SGML.
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