语法(Page 167)B1.The ponderosa pine is _____ of most of the timber used by forest product firms in the Black Hills of South Dakota.(A)the source(B)as so...
Question 29-39Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat.One adaptation is to...
阅读(Page 168-170)Question 1-8With Robert Laurent and William Zorach,direct carving enters into the story of modern sculpture in the United States.Direc...
Question 20-30Before the mid-nineteenth century,people in the United States ate most foods only in season.Drying,smoking,and salting could preserve me...
语法 (Page 174)1.Some snakes lay eggs,but others _____ birth to live offspring.(A)give(B)giving(C)they give(D)to have given2.Because it was so closely r...
Question 20-28Under certain circumstance the human body must cope with gases at greater-than-normal atmospheric pressure.For example,gas pressures inc...
阅读(Page 175-177)Question 1-9In the 1600's when the Spanish moved into what later was to become the southwestern United States,they encountered the...
阅读Question 1-7Hotels were among the earliest facilities that bound the United States together.They were both creatures and creators of communities,as ...
语法1.Portland,Maine,is _____ the poet Henry Wadsworth Longfellow spent his early years.(A)where(B)it where(C)where is(D)which is where2.As consumers...
Question 32-38If you look closely at some of the early copies of the Declaration of Independence,beyond the flourished signature of John Hancock and t...