There were___ for Saturday’s movie（）
A. not available tickets
B. no available
C. no tickets available
D. tickets no available
查看答案
Which statement about ethanol is correct（）
AIt burns in air to form ethene and water
BIt is prepared from ethene by fermentation
CIt is prepared from glucose in an addition reaction
DIt is the only product when ethene reacts with steam
Which statement about alkenes is not correct（）
A They are hydrocarbons
B They are saturated
C They contain a C=C bond
D They form polymers
Suggest the shape of the phosphine molecule, PH3（）
A. Trigonal planar
B. Trigonal pyramidal
C. Trigonal bipyramidal
D. Octahedral
Ethanol is soluble in water. The best explanation for this is（）
A. ethanol molecules form hydrogen bonds with water molecules
B. ethanol molecules form London （dispersion） forces with water molecules
C. ethanol molecules form permanent dipole interactions with water molecules
D. ethanol and water are miscible liquids
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