When does the plane take off？
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How many guests are arriving？
A. 8
B. 6
C. 10
Which of the following did Leavitt's work provide astronomers with the means of determining？
A. The absolute brightness of any observable Cepheid variable.
B. The apparent brightness of any object at a given distance from an observer.
C. The distance from earth of any galaxy containing an observable Cepheid variable.
D. Both A and C
诚实信用是《民法通则》规定的原则，《民法通则》是单行法，因此，这个规定只适用于民事权利义务关系，不能适用于《合同法》规定的合同关系。()
A. 正确
B. 错误
民法上的平等原则，包括机会平等和结果平等。()
A. 正确
B. 错误
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