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搜题
【单选题】
What is the major difference(s) between perspective and parallel projection?A.
parallel projection can only be used with objects containing parallel edges.
B.
perspective projection gives a more realistic representation of an object
C.
parallel projection is equivalent to a perspective projection where the viewer is standing infinitely far away
D.
perspective projection can only be used for creating oblique and not isometric pictorials
E.
b. and c.
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【多选题】货运代理人在进行危险货物托运单的缮制时,除一般普通货物共同需要的内容以外,还需增加( )等内容。
A.
危险货物性质
B.
危险货物类别
C.
危险货物别名
D.
危险货物联合国编号
【多选题】货运代理人在进行危险货物托运单的缮制时,除一般普通货物共同需要的内容以外,还需增加( )等内容。
A.
危险货物性质
B.
危险货物类别
C.
危险货物别名
D.
危险货物联合国编号
【简答题】货运代理人在进行危险货物托运单的缮制时，除一般普通货物共同需要的内容以外，还需增加（ ）等内容。
【判断题】An electron in the 3s, 3p, or higher orbitals in a hydrogen atom is in an excited state.
A.
正确
B.
错误
【单选题】What are the values of four quantum numbers of an electron in the 4p orbital?
A.
n =4, l =1, m l =-1,0,+1
B.
n =4, l =0, m l =0
C.
n =4, l =2, m l =-2,-1,0,+1,+2
D.
n =4, l =3, m l =-3,-2,-1,0,+1,+2,+3
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