在石油产品硫含量测定法(燃灯法)中,要求燃灯的()高度是6mm~8mm。
A.燃灯
B.样瓶
C.火焰
D.燃烧
参考答案:C
眼球纤维膜()
A.是眼球壁的最内层
B.富有血管和色素细胞
C.全层均透明
D.前1/6部分为角膜
E.后5/6为睫状体
Which of the following statements is NOT true of the global tourism industry a. The tourism industry is undergoing restructuring in parts of the world. b. It remains thoroughly fragmented and widely distributed. c. It yields considerable annual profits. d. It creates more than 200 million jobs globally.