2. 外语
  3. (As do) all insects, a butterfly has a hard (outer) covering, (called it) an exoskeleton, (that both) supports and protects the

(As do) all insects, a butterfly has a hard (outer) covering, (called it) an exoskeleton, (that both) supports and protects the

admin2004-12-28  51
问题 (As do) all insects, a butterfly has a hard (outer) covering, (called it) an exoskeleton, (that both) supports and protects the body.
选项 A、As do
B、outer
C、called it
D、that both
答案C
解析
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