39. Virginia is mentioned as an example of a state that (A) built roads without tollgates (B) built roads with government money (C) completed 1,500 miles of turnpikes in one year (D) introduced new law restricting road use

45. In lines 17-18, the author mentions the "expansion of halite crystals...by heating and of sulfates and similar salts by hydration" in order to (A) present an alternative theory about crystal growth (B) explain how some rocks are not affected by salt (C) simplify the explanation of crystal prying and wedging (D) introduce additional means by which crystals destroy rocks

39. Virginia is mentioned as an example of a state that (A) built roads without tollgates (B) built roads with government money (C) completed 1,500 miles of turnpikes in one year (D) introduced new law restricting road use

其他試題

39. Virginia is mentioned as an example of a state that
(A) built roads without tollgates
(B) built roads with government money
(C) completed 1,500 miles of turnpikes in one year
(D) introduced new law restricting road use