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【简答题】
（15分）氮的化合物在无机化工领域有着重要的地位。请回答下列问题： （1）基态氮原子的价电子排______。氮的最高价氧化物为无色晶体，它由两种离子构成：已知其阴离子构型为平面正三角形，则其阳离子的构型为 形，阳离子中氮的杂化轨道类型为 。 （2）某氮铝化合物X具有耐高温、抗冲击、导热性好等优良性质，广泛用于陶瓷工业等领域。工业上用氮气与氧化铝和碳在一定条件下反应生成X和CO，X的晶体结构如图所示，工业制备X的化学方程式为____。 （3）X晶体中包含的化学键类型为______。（填字母标号） A．离子键 B．共价键 C．配位键 D．金属键 （4）已知氮化硼与X晶体类型相同，且氮化硼的熔点比X高，可能的原因是______ （5）若X的密度为pg/cm 3 ,则晶体中最近的两个N原子的距离为______cm(加德罗常数用N A 表示，不必化简）。
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举一反三
【简答题】Translate the following sentences and pay attention to the underlined parts. Television is the transmission and reception of images of moving objects by radio waves. The pupil of the eye responds to t...
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中心静脉压70Pa,血压9.3/6.7kPa处理时应做补液试验
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休克时应先输入晶体溶液
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【单选题】You are comparing two annuities which offer quarterly payments of $2,500 for five years and pay 0.75 percent interest per month. Annuity A will pay you on the first of each month while annuity B will ...
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These two annuities have equal present values but unequal futures values at the end of year five
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【单选题】关于休克，下列哪项是错误的
A.
休克时，微循环的变化晚于血压下降
B.
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休克时有效循环血量急剧减少
D.
休克代偿期血压可略高于正常
E.
中心静脉压可低于5 cmH 2 0
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【简答题】You are comparing two annuities which offer quarterly payments of $2,500 for five years and pay 0.75% interest per month. Annuity A will pay you on the first day of each month while annuity B will pay...
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【简答题】Translate the following sentences and pay attention to the underlined parts. Television is the transmission and reception of images of moving objects by radio waves. The pupil of the eye responds to t...
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【单选题】休克时下列哪项论述是错误的?( )
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【单选题】You are comparing two annuities which offer quarterly payments of $2,500 for five years and pay 0.75 percent interest per month. Annuity A will pay you on the first of each month while annuity B will ...
A.
These two annuities have equal present values but unequal futures values at the end of year five
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These two annuities have equal present values as of today and equal future values at the end of year five
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【单选题】关于休克，下列哪项是错误的
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D.
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E.
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查看完整题目与答案
【简答题】You are comparing two annuities which offer quarterly payments of $2,500 for five years and pay 0.75% interest per month. Annuity A will pay you on the first day of each month while annuity B will pay...
查看完整题目与答案
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