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【多选题】
(Multiple-choice question) In the absence of padding, the drawing area of background is changed from including the border to not including the border. As shown in the renderings below, which of the following codes can achieve this goal?( )
A.
background-clip: padding-box;
B.
background-clip: content-box;
C.
background-clip: border-box;
D.
background-position: border-box;
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举一反三
【单选题】In css3, the incorrect statement about shadow background is ( ).
A.
using box-shadow to define the shadow style.
B.
using "inset" to set the inner shadow in box-shadow.
C.
the default color in box-shadow is black.
D.
In the box-shadow attribute, a negative value in the horizontal direction means moving to the right, and a negative value in the vertical direction means moving down.
【多选题】(Multiple-choice question) Which of the following items are new attributes of css3? ( )
A.
border-image
B.
border-radius
C.
box-shadow
D.
border-color
【单选题】To specify the drawing area of background to the content box, which value of the background-clip attribute should be used? ( )
A.
content-box
B.
border-box
C.
padding-box
D.
none-box
【单选题】Which of the new background image attributes in CSS3 can draw the starting point of the background image? ( )
A.
background-clip
B.
background-size
C.
background-origin
D.
background-position
【单选题】Which of the following statements about the use of svg is incorrect? ( )
A.
The <polyline> is used to draw polylines.
B.
The <polygon> is used to draw a polygon.
C.
The <ellipse> is used to draw a circle.
D.
The <rect> is used to draw a rectangle.
【单选题】In the new background-size attribute values of CSS3, which can make the background image proportionally scaled to fill the whole container?（ ）
A.
cover
B.
length
C.
percentage
D.
contain
【单选题】In css3, which of the following statements about the sibling selector is incorrect? ( )
A.
A sibling selector can select an element that follows another element, and both have the same parent element.
B.
Sibling selector only retrieves backward, not forward.
C.
Use "~" to represent ordinary sibling selectors.
D.
Use "+" to represent adjacent sibling selector to indicate all subsequent elements with the same parent element.
【单选题】Which of the following statements about the following code iscorrect？ ( ).box div[class*=s]{background: red }
A.
The background color ofthe first div with s in its class name in box is red.
B.
The background color of all the divs with s in their class names in box is red.
C.
The background color of the first div ending with s in its class name in box is red.
D.
The background color of all the divs ending with s in their class names in box is red.
【单选题】Which of the following codes can achieve the following effect? (The background color of all the divs starting with n in their class names in box is red.) ( )
A.
.box div[class^=n]{background:red}
B.
.box div[class*=n]{background:red}
C.
box div[class=n]{background:red}
D.
.box div[class$=n]{background:red}