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下图是桃花和桃的果实解剖结构示意图。请据图回答:(7分) (1)图中能产生花粉的结构是 ,能接受花粉的结构是 。桃花主要依靠 来传粉,因为桃花有香气和 枚鲜艳的花瓣。 (2)桃子可食用的部分是由 (填名称)发育而来的,图中⑧是由 发育而来的。 (3)一朵已授粉的桃花,哪一部分被害虫吃掉后将不能结出果实 A.花被 B.雄蕊 C.雌蕊 D.蜜腺
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【简答题】Cathy is taking notes of the grammatical rules in class at Sunshine School, where she __________ English for a year. A.studies B.studied C.is studying D.has been studying
【单选题】根据现行《火灾自动报警系统设计规范》,设备面盘的排列长度大于4m时,其两端应设置宽度不小于()的通道
A.
0.8m
B.
0.9m
C.
1.0m
D.
0.7m
【单选题】The publication of _____ established Emerson as the most eloquent spokesman of the New England Transcenden- talism.
A.
Nature
B.
Self-Reliance
C.
The Over-Soul
D.
The American Scholar
【单选题】According to the passage, the processing of the new antibiotic and vaccines becomes an engineering problem when ______.
A.
it involves the low-cost production of large quantities
B.
these items originate in the work of biochemistry
C.
people are engaged in safe operations in the test-tube stage
D.
business agents use efficient methods to market these items
【简答题】This is my first day at our new school. In the morning, I help my new teacher Mr Hu put some new English textbooks into a big box. And then I carry it to the classroom. The box is very heavy. I walk v...
【单选题】The publication of ______established Emerson as the most eloquent spokesman of the New England Transcendentalism.
A.
Nature
B.
Serf-Reliance
C.
The Over-Soul
D.
The American Scholar
【单选题】你经常想知道別人是怎样看待或评价自己的
A.
B.
【简答题】国 际标准化组织的简称是
【单选题】关于细菌对氧的需要分类,下列哪项是正确的( )
A.
兼性厌氧菌
B.
专性厌氧菌
C.
专性需氧菌
D.
微需氧菌
E.
以上都是
【单选题】国际标准化组织的简称是( )
A.
ISO
B.
IEC
C.
ITU
D.
IMF
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