As it is used in paragraph 4 of the passage, the word porous means______.

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As it is used in paragraph 4 of the passage, the word "porous" means______.

A.having or full of holes

B.lacking physical strength, energy, or vigor

C.easily broken or hurt

D.powerful against harm.

参考答案:

A解析:porous是pore的形容词形式,意为“多孔的”。