南京中山陵一带有一种不起眼的小草—琉璃草,最新研究证实琉璃草具有抗淋巴结核的功效。这一发现说明许多现在还不了解的野生生物( ) A . 具有直接价值 B . 具有间接价值 C . 具有潜在价值 D . 没有价值 答案:C 3._________last year, the number of people traveling this holiday weekend is expected to increase slightly. A.Being compared to B.Comparing to C.Compared with D.Comparing with