皮皮学，免费搜题
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搜题
【单选题】
MHC 分子与 T 淋巴细胞表面 CD4 或 CD8 分子结合的部位在( )
A.
肽结合区
B.
免疫球蛋白样区
C.
胞膜外区
D.
跨膜区
E.
胞质区
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】The plant called the scarlet gilia can have either red or white flowers. It had long been thought that hummingbirds, which forage by day, pollinate its red flowers and that hawk-moths, which forage at...
A.
Uncovered scarlet gilia flowers, whether red or white, became pollinated at approximately equal rates.
B.
Some red flowers of the scarlet gilia that remained uncovered at all times never became pollinated.
C.
White flowers of the scarlet gilia that were covered at night became pollinated with greater frequency than white flowers of the scarlet gilia that were left uncovered.
D.
Scarlet gilia plants with red flowers covered by day and scarlet gilia plants with white flowers covered at night remained unpollinated.
E.
In late August, when most of the hummingbirds had migrated but hawkmoths were still plentiful, red scarlet gilia plants produced fruit more frequently than they had earlier in the season.
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【简答题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在_________ 分裂过程中。
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【单选题】The majority of other books on plant taxonomy are either less concise or more ________.
A.
s pecialized
B.
patient
C.
modified
D.
appreciative
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【单选题】、2015U2-63男,68岁反复咳嗽、咳痰15年, 加重伴发热3天。吸烟史40年, 1包/天。查体: T38.8°C,口唇发绀。桶状胸,双肺可闻及哮鸣音和湿啰音。血WBC10.3x109/L,N 0.85。 该患者最可能的诊断是
A.
支气管肺癌
B.
肺血栓栓塞
C.
慢性阻塞性肺疾病
D.
支气管扩张
E.
支气管哮喘
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【单选题】将来可以用来精确测量哈勃常数 但现在精度不高的方法是什么( )
A.
超新星
B.
CMB
C.
造父变星
D.
引力波
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【简答题】简述使用紫外灯的注意事项。
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【单选题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在________过程中
A.
有丝分裂
B.
减数分裂
C.
体细胞分裂
D.
无丝分裂
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【判断题】自适应巡航系统不能实现根据路况自动调节车速。
A.
正确
B.
错误
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【简答题】单词拼写。 根据首字母或中文提示写出正确的英文单词或短语。 1. We saw a_______ farms which were built more than a hundred years ago. 2. Now we're leaving the business district and _______ (接近) the harbour. 3. After a long-distance...
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【简答题】Either the plant or the flowers will lose ____________ freshness.A. his B. its C. theirs D. their
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相关题目：
【单选题】The plant called the scarlet gilia can have either red or white flowers. It had long been thought that hummingbirds, which forage by day, pollinate its red flowers and that hawk-moths, which forage at...
A.
Uncovered scarlet gilia flowers, whether red or white, became pollinated at approximately equal rates.
B.
Some red flowers of the scarlet gilia that remained uncovered at all times never became pollinated.
C.
White flowers of the scarlet gilia that were covered at night became pollinated with greater frequency than white flowers of the scarlet gilia that were left uncovered.
D.
Scarlet gilia plants with red flowers covered by day and scarlet gilia plants with white flowers covered at night remained unpollinated.
E.
In late August, when most of the hummingbirds had migrated but hawkmoths were still plentiful, red scarlet gilia plants produced fruit more frequently than they had earlier in the season.
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【简答题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在_________ 分裂过程中。
查看完整题目与答案
【单选题】The majority of other books on plant taxonomy are either less concise or more ________.
A.
s pecialized
B.
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C.
modified
D.
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查看完整题目与答案
【单选题】、2015U2-63男,68岁反复咳嗽、咳痰15年, 加重伴发热3天。吸烟史40年, 1包/天。查体: T38.8°C,口唇发绀。桶状胸,双肺可闻及哮鸣音和湿啰音。血WBC10.3x109/L,N 0.85。 该患者最可能的诊断是
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B.
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C.
慢性阻塞性肺疾病
D.
支气管扩张
E.
支气管哮喘
查看完整题目与答案
【单选题】将来可以用来精确测量哈勃常数 但现在精度不高的方法是什么( )
A.
超新星
B.
CMB
C.
造父变星
D.
引力波
查看完整题目与答案
【简答题】简述使用紫外灯的注意事项。
查看完整题目与答案
【单选题】在连锁遗传时,形成亲代所不具有的新组合,其形成机制是交换的发生,研究发现交换发生在________过程中
A.
有丝分裂
B.
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C.
体细胞分裂
D.
无丝分裂
查看完整题目与答案
【判断题】自适应巡航系统不能实现根据路况自动调节车速。
A.
正确
B.
错误
查看完整题目与答案
【简答题】单词拼写。 根据首字母或中文提示写出正确的英文单词或短语。 1. We saw a_______ farms which were built more than a hundred years ago. 2. Now we're leaving the business district and _______ (接近) the harbour. 3. After a long-distance...
查看完整题目与答案
【简答题】Either the plant or the flowers will lose ____________ freshness.A. his B. its C. theirs D. their
查看完整题目与答案