假如一位老师要在网页上放置一张风景图片,下列哪种格式最为适合()
A.PSD
B.BMP
C.JPEG
D.MPEG
参考答案:C
The boy is so fat ________too much food and little exercise.
A.as
B.that
C.because
D.because of
89C51在什么条件下可响应中断?