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【单选题】
一条受污染河流中鱼类突然大量死亡最常见的原因是A.
pH 值异常
B.
DO 值过低
C.
有毒物质存在
D.
有病原物存在
E.
缺少营养物质
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【判断题】在下面的程序段中,内层for语句的循环体中不存在中止循环的控制语句,也没有改变i和j的值的操作,则内循环体执行的总次数为20至30次。(第4章 循环结构程序设计) int i,j; for(i=5;i;i--) for(j=1;j<5;j++) { ...... }
A.
正确
B.
错误
【多选题】Choose the necessary questions listed below to create a survey which can identify potential customers for chemical cleaners.
A.
In which of the following departments are you working?
B.
Overall how do you rate your satisfaction with the cleaner you are now using?
C.
Which brand or brands of household cleaners do you often use?
D.
How often do you shop?
E.
Are you female or male?
F.
Over the past two years, how often have you bought chemical cleaners?
G.
How often do you clean your room?
【判断题】Choose the necessary parts that should be included in a welcome speech from the following, please tick ringht if you think one is necessary, and tick wrong if you think one is not. 判断出下列表达中，哪些是必须要包含在欢...
A.
正确
B.
错误
【单选题】云南教育网的网址为http://www.ynjy.cn,该网站的顶级域名及其表示的含义是( )
A.
www 万维网
B.
cn 中国
C.
http 超文本传输协议
D.
ynjy 教育
【判断题】Choose the necessary parts that should be included in a welcome speech from the following, please tick ringht if you think one is necessary, and tick wrong if you think one is not. 判断出下列表达中，哪些是必须要包含在欢...
A.
正确
B.
错误
【判断题】Choose the necessary parts that should be included in a welcome speech from the following, please tick ringht if you think one is necessary, and tick wrong if you think one is not. 判断出下列表达中，哪些是必须要包含在欢...
A.
正确
B.
错误
【简答题】下面VBA程序的循环次数为_______________。For i=35 To 8 Step -7Debug.Print iNext i(D)A. 35 B. 8 C. 0 D. 4
【简答题】下面VBA程序的循环次数为_______________。For i=10 To 40 Step 6Debug.Print iNext iA. 5 B. 6 C. 32 D. 33
【判断题】Choose the necessary parts that should be included in a welcome speech from the following, please tick ringht if you think one is necessary, and tick wrong if you think one is not. 判断出下列表达中，哪些是必须要包含在欢...
A.
正确
B.
错误
【单选题】云南教育网的网址为http://www.ynjy.cn,该网站的顶级域名及其表示的含义是( )
A.
www 万维网
B.
cn 中国
C.
ynjy 教育
D.
http 超文本传输协议
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