a field guide是什么意思

a field guide

意思就是：一本指导手册

以下是维基百科给出的解释：

A field guide is a book designed to help the reader identify wildlife (plants or animals) or other objects of natural occurrence (e.g. minerals). It is generally designed to be brought into the 'field' or local area where such objects exist to help distinguish between similar objects.Field guides are often designed to help users distinguish animals and plants that may be similar in appearance but are not necessarily closely related.

意思就是说指导手册是专门设计帮助读者认识、理解某些标志或者事务的小册子。

51. A

依据：Four French teens were out exploring in the woods off the northern slopes of the Pyrenees.

其中的slopes意思是“斜坡”；the Pyrenees 比利牛斯山脉

52. C

依据：Some were inhabited by humans thousands and thousands of years ago.

inhabit vt.居住/栖息

53. A

依据：Between 15,000-17,000 years ago, humans painted lively creatures such as cows, bulls, horses, and even cats on the walls of the cave.

54. B

依据：The actual cave of Lascaux was closed in 1963 due to the over-abundance of tourists visiting the site.

55. B

依据：Not more than six persons can enter the cave per day.

6 × 7 = 42.

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