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【判断题】
(True or False) The box-sizing attribute in css can be used to switch between IE box model and standard box model.
A.
正确
B.
错误
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Please select an expression whose result is true. ( )
A.
null instanceof Object
B.
null === undefined
C.
null == undefined
D.
NaN == NaN
【单选题】Which one has the highest priority among js operators? ( )
A.
brackets（）
B.
+
C.
=
D.
*
【单选题】Which of the following statements about variable declare in js is correct? ( )
A.
The var keyword cannot be omitted when js defines a variable, otherwise an error will be reported.
B.
Variable name cannot start with $.
C.
The declaration of a variable is represented by the keyword var, but it can also be omitted.
D.
Js variables are declared by var just like php variables.
【多选题】(Multiple-choice question) Which of the following statements about obtaining page elements are correct? ( )
A.
document.getElementById("a") means to obtain an element in the page by the id value "a".
B.
document.getElementsByName("na")means to obtain an element in the page by the name attribute value "na".
C.
document.getElementsByTagName("div") means to get all divs by tag name.
D.
The above statements are not correct.
【单选题】What does the following code output? ( )var i=0, j=0; for(; i<10, j<7; i++, j++) { k=i+j; }console.log(k);
A.
16
B.
10
C.
12
D.
6
【单选题】Run the following code, y and z result are ( ) respectively.var m=1,j=k=0;function add(n){return n=n+1;}y=add(m);function add(n){return n=n+3;}z=add(m);
A.
2,4
B.
4,4
C.
2,2
D.
exception
【单选题】Which of the following expressions returns false? ( )
A.
!(3<=1)
B.
(4>=4) && (5<=2)
C.
("a"=="a") && ("c" != "d")
D.
(2<3) || (3<2)
【单选题】Which of the following ways to introduce external js into html is corrent? ( )
A.
<script href='https://cdn.shuashuati.com/imgs/a95092819215d41e0a25bd3c08990fa0tion'></script>
B.
<script src='https://cdn.shuashuati.com/imgs/a95092819215d41e0a25bd3c08990fa0tion'></script>
C.
<script link='https://cdn.shuashuati.com/imgs/a95092819215d41e0a25bd3c08990fa0tion'></script>
D.
<script target='https://cdn.shuashuati.com/imgs/a95092819215d41e0a25bd3c08990fa0tion'></script>