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【单选题】
下列关于扫描仪工作原理的叙述，正确的顺序是（ ）。① 获得点的灰度值或色彩编码值；②将纸介质的图转换为一个数字信息阵列；③将图像变成一个点阵图形；④存入计算机的文件中使用相关软件进行显示和处理。A.
①②③④
B.
①③②④
C.
③②①④
D.
③①②④
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【单选题】Password is a secret series of(69)that enables a user to access a file, computer, or program. On multi-user systems, each user must enter his or her password before the computer will respond to(70). T...
A.
symbol
B.
sign
C.
characters
D.
characteristic
【简答题】Learning to use a computer is getting easier all the time because ________. A) programs are becoming less complicated B) programs are designed to be convenient to users C) programming is becoming easi...
【单选题】药品生产、经营企业和医疗机构发现或者获知新的、严重的药品不良反应应当报告，时间是
A.
10日之内
B.
15日之内
C.
20日之内
D.
25日之内
E.
30日之内
【单选题】He has been interested in computer since his childhood, so he specialized______ computer science when he was in college.
A.
on
B.
at
C.
for
D.
in
【单选题】______, he finds the work interesting.
A.
Though he is computer expert
B.
A computer expert he is
C.
As computer expert
D.
Computer expert as he is
【单选题】does he have to type the report on a computer， he has to get the computer to translate it into sounds.
A.
Not only；but also
B.
Either；or
C.
Both；and
D.
Not；but
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【单选题】药品生产、经营企业和医疗机构发现或者获知新的、严重的药品不良反应应当（）
A.
立即报告
B.
在5日内报告
C.
在10日内报告
D.
在15日内报告
E.
在30日内报告
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