皮皮学，免费搜题
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搜题
【简答题】
鸟类的生殖和发育一般依次包括______、交配、______ 、______、孵卵和育雏几个阶段，每个阶段都伴随着复杂的繁殖行为。
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】We were all very much worried over the fact you were ill.
A.
that
B.
which
C.
on which
D.
about which
【单选题】They were all very much warned over the fact______you were sick.
A.
which
B.
as
C.
what
D.
that