皮皮学，免费搜题
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【简答题】
试述被子植物从孢原细胞的产生到成熟花粉粒形成的整个花药发育过程。
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反馈参考答案：
举一反三
【单选题】This newly released portrait of Planet Earth is actually a ______ of several pictures taken earlier this month by a new research satellite.
A.
composite
B.
series
C.
means
D.
part
【单选题】Those are your socks. Please ________. [ ]
A.
put on it
B.
put it on
C.
put on them
D.
put them
【多选题】以第三方支付为运营主体的运营模式具有哪些特点?()
A.
具有桥梁作用
B.
可以协调银行与移动运营商之间的利益关系
C.
只在互联网上进行经营，没有实体渠道
D.
用户需要更换手机
【简答题】This newly released portrait of Planet Earth is actually a of several pictures earlier this month by a new research satellite.
相关题目：
【单选题】Those are your socks. Please ________. [ ]
A.
put on it
B.
put it on
C.
put on them
D.
put them
参考解析：
知识点：
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