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【单选题】
What is the Republic of Ireland called in Irish?A.
Irea
B.
Aire.
C.
Eare.
D.
Eire.
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列叙述中,不能表示σ键的特点的是
A.
原子轨道沿键轴方向重叠，重叠部分沿键轴方向成圆柱形对称
B.
两原子核之间的电子云密度最大
C.
键的强度通常比π键大
D.
键的长度通常比π键长
【单选题】Identify the INCORRECT statement about environmental regulations.
A.
Environmental regulations are often lacking in developing nations.
B.
Environmental regulations are similar across developed and developing nations.
C.
Developed nations have substantial regulations governing the emission of pollutants, the dumping of toxic chemicals, and so on.
D.
Inferior environmental regulations in host nations, as compared to home nation, can lead to ethical issues.
【简答题】The new regulations for the sector ____________ (即将实施).
【单选题】下列叙述中,不能表示π键特点的是
A.
原子轨道以肩并肩方式重叠，重叠部分对键轴所在的某一特定平面具有反对称性；
B.
电子云集中在两核之间；
C.
键的强度通常比 σ 小；
D.
通常具有 C=C 的分子较活泼。
【单选题】下列叙述中,不能表示 σ键特点的是( )
A.
原子轨道沿键轴方向重叠，重叠部分沿键轴方向成“圆柱形”对称
B.
两原子核之间的电子云密度最大
C.
键的强度通常比π键大
D.
键的长度通常比π键长
【单选题】Identify the INCORRECT statement about environmental regulations
A.
Environmental regulations are often lacking in developing nations
B.
Environmental regulations are similar across developed and developing nations.
C.
Developed nations have substantial regulations governing the emission of pollutants, the dumping of toxic chemicals, etc.
D.
Inferior environmental regulations in host nations, as compared to home nation, can lead to ethical issues.
【单选题】2-2-6 下列叙述中,不能表示 σ 键特点的是( )。
A.
原子轨道沿键轴方向重叠，重叠部分沿键轴方向呈圆柱形对称
B.
两原子核之间的电子云密度最大
C.
键的强度通常比 π 键大
D.
键的长度通常比 π 键长
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