《工程数学2387》18春在线作业1-0001

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/c85d8fea.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/fbb7f751.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/ade81106.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/ee567455.JPG”></IMG>

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A:不是，6
B:是，  6
C:不是，0
D:是，  0

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/285b3cbe.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/7a30b560.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/4898bbba.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/687396e3.JPG”></IMG>

定长矢量与其导矢之间满足的关系是
A:相互平行
B:相互垂直
C:大小相等
D:垂直且大小相等

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/fe6657a0.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/ea722ae9.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/e63d6cbc.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/645d1447.JPG”></IMG>

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A:1
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/280f1655.JPG”></IMG>
C:0
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/d04f14a8.JPG”></IMG>

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/91136f92.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/7fc903df.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/d94c1a3b.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/d02adcc7.JPG”></IMG>

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/41c861c5.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/f03189ae.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/f8cc9e09.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/6fd4bd68.JPG”></IMG>

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/5fa3bb44.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/724edab7.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/3ed35b55.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061020/5bf3c4e1.JPG”></IMG>

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/35dba3b5.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/a565b1fc.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/53439a02.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/a088e0c6.JPG”></IMG>

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/0e42b66e.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/2a6353c0.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/a752cbf8.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/9a17c625.JPG”></IMG>

下面描述正确的是
A:调和场的旋度为0
B:调和场的散度为0
C:调和场的梯度为0
D:调和场的旋度和散度有可能不全为0。

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/9efd0af6.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/70a96c4d.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/bae73dff.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/11c8109c.JPG”></IMG>

下例选项正确的是
A:数量场的梯度场是数量场。
B:数量场的梯度场是矢量场。
C:矢量场没有梯度场。
D:矢量场有梯度场。

下面的概念是矢量的是
A:梯度
B:散度
C:旋度
D:方向导数

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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/be7d0796.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/4cc0b2ca.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/6069b646.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/multiselect/jiaoxuecd/20061123/6496815d.JPG”></IMG>

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A:错误
B:正确

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A:错误
B:正确

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A:错误
B:正确

3、        单位阶跃函数不满足狄利克雷条件，但是正、余弦满足狄利克雷条件。
A:错误
B:正确

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A:错误
B:正确