单项选择题
A.studies B. problems C. similarities D. biases
Although research has shown that asparagus does contain...
单项选择题Although research has shown that asparagus does contain many important nutrients, it is not, as it was once regarded, a panacea.()
A.an anomaly B. a delicacy C. a life-form D. a cure-all
The Moon and most artificial satellites travel around t...
单项选择题The Moon and most artificial satellites travel around the Earth in elliptical paths().
A.waves B. orbits C. voyages D. flights
