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多选题
Studded starfish are well protected from most predators and parasites by ______ surface whose studs are actually modified spines.
A
a vulnerable
B
an armored
C
an obtuse
D
a brittle
E
a concave
F
a rugged
参考答案
参考解析
解析：
句子表明，海星皮肤表层的脊椎就像是体刺，能够很好的保护其不受天敌和寄生虫的侵犯，因此最符合空格处意思的词语应该是B armored（装甲的，铠装的）和F rugged（坚固的，粗糙的）；A vulnerable易受攻击的；易受伤害的；C obtuse钝的，不锋利的；D brittle易碎的，脆弱的；E concave凹的，凹面的。
句子表明，海星皮肤表层的脊椎就像是体刺，能够很好的保护其不受天敌和寄生虫的侵犯，因此最符合空格处意思的词语应该是B armored（装甲的，铠装的）和F rugged（坚固的，粗糙的）；A vulnerable易受攻击的；易受伤害的；C obtuse钝的，不锋利的；D brittle易碎的，脆弱的；E concave凹的，凹面的。
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