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【单选题】
下面对JPEG格式描述不正确的一项是A.
照片、油画和一些细腻、讲求色彩浓淡的图片常采用JPEG格式
B.
JPEG支持很高的压缩率，因此其图像的下载速度非常快
C.
最高只能以256色显示的用户可能无法观看JPEG图像
D.
采用JPEG格式对图片进行压缩后，还能再打开图片，然后对他重新整饰、编辑、压缩
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举一反三
【简答题】霍尔计数传感器如图所示,当钢球通过霍尔开关传感器时,传感器可输出毫伏脉冲电压,该电压经( )放大后,驱动三极管工作,三极管输出端接( )进行计数。
【简答题】It was a cold night. The taxi driver didn’t take even one passenger（乘客） all day. When he went by the railway station，he saw a young man coming out with two bags in his hands. So he drove to him and as...
【单选题】You didn’t take his advice. __ his advice, you _____ such a mistake.
A.
Had you taken; wouldn’t have made
B.
If you had taken; wouldn't make
C.
Were you lo take; shouldn’t have made
D.
Have you taken; won' t have made
【单选题】You didn’t take his advice, ______it, you ______such a mistake. A.If you had taken, would make B.Were you to take, shouldn’t have made C.Had you taken, wouldn’t have made D.Have you taken, won’t have ...
A.
B.
C.
D.
D
【简答题】阅读理解。 It was a cold night. The taxi driver didn’t take even one passenger all day. When he went by the railway station , he saw a young man coming out with two bags in his hands. So he drove to him an...
【单选题】三、完形填空 (本题10小题,每小题2分,共20分) 从 A、B、C、D四个选项中选出最佳答案 Many Chinese students find it difficult to learn English ,but not Chinese, because Chinese is their mother language.In fact Chinese is much more difficu...
A.
He
B.
She
C.
Her
D.
His
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