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【单选题】
下列关于环节动物特征的叙述,正确的是:
A.
身体由许多彼此相似的体节组成，靠刚毛或疣足辅助运动
B.
身体和附肢都分节，提高了运动能力
C.
体表包裹着一层密不透水的角质层，起保护作用
D.
身体有口无肛门，食物残渣由口排出体外
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【简答题】My brother and I often fight with each other over small things. One day our father said to us, “Tomorrow we will take part in the Ray Home Sports Day. Both of you must go with me. Perhaps you can lear...
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