某实验小组分别用如图所示的甲、乙两个滑轮组(每个滑轮重相同)匀速提起相同的重物。不计绳重及摩擦。下列说法正确的是A.甲图省力 机械效率甲图大B.甲图省力 机械效率一样大C.乙图省力 机械效率一样大D.乙图省力 机械效率乙图大 答案:CIt is said that there are millions of camels in India and _______ of them is growing.A. the number B. a great number C. a lot D. a good many