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【判断题】
命令w=conv(u,v)表示多项式u和v相乘。()A.
正确
B.
错误
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【单选题】听力原文： I was recently working with some sixth form. comprehensive school students, when a television company asked for permission to come in and make a short film of our activities. The arrival of the ...
A.
Because everyone wore her best clothes.
B.
Because the classroom had never been a studio.
C.
Because the speaker was going to be well known.
D.
Because it involved a lot of equipment and workers.
【简答题】A．The man will be hired as the worker of the company. B．They appreciate the man for his experience in computer s. C．They will not hire the man for he is just a player. D．The man is more compe...
【简答题】南南同学跟妈妈学烧紫甘蓝(紫卷心菜)，用油炒后加入食醋，发现紫色的叶片立即变红，激发了他的探究欲望。 [提出问题]紫甘蓝的汁液能作酸碱指示剂吗? [进行实验]取紫甘蓝叶片少许在研钵中捣烂，用少量水浸泡，滤出蓝紫色的汁液。将汁液分别滴入下列液体中，观察其显示的颜色并记录。 [得出结论]门紫甘蓝的汁液________(选填“能”或“不能”)作酸碱指示剂。 [质疑并求证]紫甘蓝的汁液在均为碱性的肥皂水和...
【简答题】编写MATALAB程序,完成下列任务: (1)在区间 [0, 4π]上均匀地取20个点构成向量t ; (2)分别计算函数y1=sin(t) 与y2=2cos(2t) 在t处的函数值; (3)在同一图形窗口绘制出曲线y1=sin(t) 与y2=2cos(2t) 。要求: y1曲线为黑色点画线,y2 曲线为红色虚线圆圈;并给图形加上标题“y1 and y2”,运行结果如图所示。
【简答题】买卖双方利用电子商务系统对所有交易细节进行网上谈判所属的阶段是 A .交易 B.贸易 C.广告发布 D.贸易磋商
【简答题】The old man is drinking in the air.
【简答题】a comprehensive school
【单选题】In Britain, the division between grammar school and vocational school was ended by the introduction of comprehensive schools in the .
A.
1930s
B.
1940s
C.
1950s
D.
1960s
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