更多"Trees ______ themselves by seeds."的相关试题:
[单项选择]The first trees were like modern trees in most ways except that ______.
A. they do not have branches
B. they do not have flowers
C. they do not have seeds
D. they do not need sunlight
[单项选择]People who love trees may（）
A. never cause trees injury
B. damage trees on purple
C. do some harm to trees without knowing it
D. not be aware of which trees are healthy
[单项选择]Why was it possible for these ancient trees let more light through than modern ones
A. Because they were closely spaced, only 3 to 16 feet apart.
B. Because they were smaller plants and shrubs.
C. Because their branches did not fan out as far as to form a shape like umbrella.
D. Because they had very small leaves like that of fern and dropped easily.
[单项选择]
The symptoms of the disease manifested themselves ten days later.
A. eased
B. appeared
C. improved
D. relieved
[单项选择]They made detailed investigations to （） themselves with the needs of the rural market.
A. adhere
B. acknowledge
C. acquaint
D. activate
[单项选择]The problems themselves are still not truly strategic because the operation of the global environment is not affected and the survival of civilization is not at stake.
A. at risk
B. at issue
C. pent up
D. adhere to
[单项选择]According to the passage, only（）trees can give us shade and products.
A. beautiful
B. old
C. healthy
D. young
[单项选择]It was a freezing winter. The trees were （） and the branches were still.
A. bare
B. empty
C. vacant
D. blank
[单项选择]Many ______ trees should be planted on the mountains.
A. thousand
B. thousand of
C. thousands of
[单项选择]There are lots of trees ______ the river.
A. in either side of
B. in either sides of
C. on either sides of
D. on either side of
[单项选择]The hills will be covered with young trees ______ a few years' time.
A. in
B. after
C. during
[单项选择]The old couple were not rich themselves, but they hated to turn away anyone who were ______ food and shelter.
A. at the mercy of
B. on the point of
C. with the exception of
D. in need of
[单项选择]With lots of trees and flowers ______ here and there, the city looks very beautiful.
A. having planted
B. planted
C. have been planted
D. to be planted
[单项选择]By cutting down trees we _______ the natural habitat of birds and animals.
A. damage
B. injure
C. hurt
D. wound
[单项选择]I hope the plan will work, but they themselves are very _________that it will.
A. doubtful
B. suspicious
C. suspect
D. dubious
[单项选择]I hope their plan will work, but they themselves are very ______ that it will.
A. tentative
B. suspicious
C. confident
D. zealous
[单项选择]There are some trees on ______ side (s) of the street.
A. both
B. every
C. either
[单项选择]There are big trees on __________ side of the quiet street.
