Proper controls that should()developed as part of routine safety procedures were not in place.
A. has been
B. have been
C. be
第1题:
______ is the conscious effort to make all jobs similar, routine, and interchangeable.
A.WWW
B.Informatization
C.Computerization
D.Standardization
第2题:
第3题:
下面哪个代码可以正确播放音频()。
A.<audio href="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </audio>
B.<audio src="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </audio>
C.<video src="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </video>
D.<audio type="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </audio>
第4题:
第5题:
第6题:
3、下面哪个代码可以正确播放音频()。
A.<audio href="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </audio>
B.<audio type="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </audio>
C.<audio src="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </audio>
D.<video src="nusic.mp3" controls="controls"> 浏览器不支持HTML5:audio </video>