4.There are 115distinct(獨(dú)特的)species of pine trees with 35native to North America.Pines are defined as evergreens with long,needle-like leaves and are only native to the northern hemisphere (半球).Pine trees are an adaptable and tough species that can survive in many conditions where other plants cannot.The average pine is 45to 60feet tall,but some are nearly twice as high.
Western White Pine
The western white pine grows the tallest of any pine tree,reaching up to 110feet in height.They have blue-green needles arranged in bundles(束)of five and produce a long cone(球果).
Bristlecone Pine
The bristlecone pine grows slowly,reading about 20feet tall.It is one of the oldest species of pine.
Mexican Pine
The Mexican pine can grow to 50feet tall,with long,slender needles that drape(下垂)off it like a weeping willow(柳樹(shù)).Often nicknamed the"willow pine",it is native to Mexico.Its leaves can droop up to 12inches long.
Sugar Pine
The sugar pine is another of the large pine species,such as the bull pine,but it also has the largest cones of any pine species,at 10to 20inches long.It grows from Oregon to California and is often used for construction.
Jack Pine
The jack pine is one of the smallest species of pine with rare leaves.Compared with the pines mentioned above,it doesn't seem to belong to the family.It is considered a member of the scrub-pine family; it prefers sandy soil.
32.From the first paragraph,we know that pinesB.
A.a(chǎn)re native to North America
B.a(chǎn)re very adaptable
C.can grow to 60feet tall at most
D.usually grow in tough conditions
33.Which of the following pines is often used as a building material?C
A.The Mexican pine.
B.The bristlecone pine.
C.The sugar pine.
D.The jack pine.
34.The underlined sentence in the last paragraph means that Jack pineD.
A.can grow only in sandy soil.
B.cannot grow without sandy soil.
C.can't grow in normal soil
D.can grow better in sandy soil
35.This text is most probably taken fromB.
A.a(chǎn) celebrity(名人)magazine
B.a(chǎn) nature magazine
C.a(chǎn) fashion magazine
D.a(chǎn) history magazine.