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【单选题】
根据图片中设定的条件,筛选结果是()A.
A002,A003,A001
B.
A002,A005,A007
C.
A003,A005,A007
D.
A002,A006,A001
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反馈参考答案：
举一反三
【简答题】PN 结空间电荷区又称为______区,在平衡条件下,电性显______,因为在区内_________所带的电量相等。P区侧应带_______,N区应带______。空间电荷区内的电场称为_______,其方向从______指向_______。
【单选题】A．形容词训练 1. A fence needs the support of three stakes, a(n) ____ fellow needs three other people.
A.
able
B.
competent
C.
unable
D.
Disable
【单选题】A group’s three overlapping sets of needs are the following except _________.
A.
procedural needs
B.
task needs
C.
maintenance needs
D.
personal needs
【简答题】PN 结空间电荷区又称为 区,在平衡条件下,电性呈 ,因为区内 所带的电量相等.
【单选题】______ was the only American president who was re-elected three times in succession.
A.
Theodore Roosevelt
B.
George Washington
C.
Franklin D. Roosevelt
D.
Thomas Jefferson
【单选题】A fence needs the support of three stakes, a(n)______fellow needs three other people.
A.
able
B.
competent
C.
unable
D.
disable
【简答题】将下列四种物质：NO、Cu（NO 3 ） 2 、Cu 2 O、HNO 3 的化学式分别填在空白处，并组成一个配平了的化学方程式：（已知氧化性：HNO 3 ＞Cu（NO 3 ） 2 ）______+______→______+______+H 2 O （1）该反应中的还原剂是______． （2）该反应中，发生还原反应的元素是______．
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