Which of the following properties of the elements chlorine, bromine and iodine increases with increasing atomic number（）
A. Boiling temperature
Bond enthalpy
C. Electronegativity
D. First ionization energy
查看答案
Which statement can be explained by intermolecular hydrogen bonding（）
A. Butane has a higher boiling point than propane
B. Hydrogen bromide forms an acidic solution when dissolved in water
C. SiH 4 has a higher boiling point than CH 4
D. Water has a higher boiling point than CH 4
Poverty and bad housing conditions are still_in some distant areas（）
A. in evidence
B. in trouble
C. in need
D. in mood
What does Katherine teach at Wellesley College（）
A. History of America
B. History of Art 100
C. Art of America in 100
D. History and Art
Which of the following statements is true of the students in the first class（）
A. Some of them have taken the course of Art History before
B. All of them have read the entire text of the course before the class
C. Some students come from Oakland, California
D. They are less interested in the course of Art History
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