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【单选题】
关于肩关节前后位摄影，下述错误的是A.
显示肱骨头与关节盂关节间隙的切线像
B.
身体矢状面必须平行于胶片
C.
肩胛骨喙突对准胶片中心
D.
中心线对准喙突投射
E.
可检查肱骨近端骨质病变
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举一反三
【单选题】What is the lecture mainly about?
A.
The role of ethylene in plant aging processes
B.
The discovery of ethylene by fruit growers
C.
Differences between ethylene and other hormones
D.
How plant hormones influence growth
【简答题】VHDL语言的客体,或称为数据对象,常见的包括____、____和____。
【简答题】A build up of ethylene gas may result in an explosion. ______
【简答题】Ethylene gas is put out by means of___________.
【单选题】In the NMR spectrum, the chemical shifts of ethylene, acetylene and benzene are in the order of ( ).
A.
benzene > ethylene > acetylene
B.
acetylene >ethylene > benzene
C.
ethylene > benzene > acetylene
D.
the chemical shifts are the same
【简答题】专家比新手拥有更强的迁移能力，其原因之一就是专家拥有更丰富的背景经验或_________。
【多选题】How does the ethylene signaling pathway work in plant cells?
A.
In the absence of ethylene, the receptor directly activates an associated protein kinase, which then indirectly promotes the destruction of the transcription regulator that switches on ethyleneresponsive genes. As a result, the genes remain turned off.
B.
In the presence of ethylene, the receptor and kinase are both inactive, and the transcription regulator remains intact and stimulates the transcription of the ethylene-responsive genes.
C.
The kinase that ethylene receptors interact with is a serine/threonine kinase that is closely related to the MAP kinase kinase kinase found in animal cells.
D.
The ethylene receptor is located in the endoplasmic reticulum; because ethylene is hydrophobic, it passes easily into the cell interior to reach its receptor.
【简答题】根据释义写出词语 1.事情做得过火了,与做得不够一样,也不好。指做事要恰如其分。( ) 2.形容人摆老资格,自负骄做的神态。( ) 3.比喻臭味相投的人勾结在一起。( ) 4.过分烦琐的仪式或礼节。也比喻其他烦琐多余的事项。( ) 5.形容(语言、文章、美术品等)洋溢着美妙的意趣。( )
【单选题】Monomers with one or more multiple covalent bonds, such as ethylene
A.
Unsaturated hydrocarbons
B.
Aerogels
C.
Saturated hydrocarbons
D.
Zeolites
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