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【单选题】
在TAE溶液配置的琼脂糖凝胶中电泳时, 质粒DNA泳动的方向是A.
正极到负极
B.
阳极到阴极
C.
阴极到负极
D.
负极到正极
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举一反三
【单选题】Americans choose their president on the ______.
A.
2nd of December
B.
2nd of November
C.
2nd of September
D.
2nd of October
【简答题】Experiments by scientists have shown that when people evaluate individuals on certain attributes ________. A) they observe the principle that beauty is only skin deep B) they do not usually act accord...
【简答题】局域运算是一个像元接一个像元运算,由单个或多个输入栅格生成新的栅格,新栅格的像元值可以由输入与输出栅格的 关系计算得到,或通过分类表对其赋值。
【单选题】According to cognitive theories of emotion,______anger occurs when______individuals believe that they have been harmed and that______harm was both avoidable and undeserved.
A.
a.../...the
B.
an.../...a
C.
/.../...the
D.
/.../...a
【简答题】Q: When individuals or groups of individuals enter a new culture, what differences and chanlleges are they faced with? A: When individuals or groups of individuals enter a new culture, they are faced ...
【单选题】与捣衣有关的诗句中,以下哪一句是杜诗?
A.
玉户帘中卷不去，捣衣砧上拂还来。
B.
寒衣处处催刀尺，白帝城高急暮砧。
C.
长信宫中秋月明，昭阳殿下捣衣声。
D.
长安一片月，万户捣衣声。
【简答题】A．∑nd2/∑nd B．∑nd3/∑nd2 C．(∑nd2/∑n)1/2 D．(∑nd3/∑n)1/3 E．∑nd4/∑nd3 平均体积径为
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