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Trees of the World: A Botanical Challenge
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第 1 题,共 10
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What is the tallest known tree species on Earth?
A
Giant sequoia (Sequoiadendron giganteum)
B
Coast redwood (Sequoia sempervirens)
C
Mountain ash (Eucalyptus regnans)
D
Douglas fir (Pseudotsuga menziesii)
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