【題組】46.According to the passage, as the nineteenth century progressed, the people of the United Stat
【題組】2. The orchid is unique because of(A) the habitat in which it lives(B) the structure of its blos
【題組】4. How many orchid seeds are typically pollinated at one time?(A) 200(B) 2,000(C) 20,000(D) 200,
【題組】5. Which of the following is a kind of petal?(A) The column(B) The sepal(C) The stem(D) The labe
【題組】6. The labellum( line 7) is most comparable to(A) a microscope(B) an obstacle course(C) an airpo
【題組】8. Which of the following is NOT mentioned as a means by which an orchid attracts insects?(A) si