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【单选题】
Who is the final survivor in Hamlet ?
A.
Horatio
B.
Hamlet
C.
Laertes
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【单选题】以下不是Dreamweaver CS5所支持的音频文件类型是______。
A.
wav
B.
au
C.
mid
D.
html
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【多选题】下面为Dreamweaver所支持的音频文件类型的是:
A.
wav
B.
mid
C.
au
D.
html
查看完整题目与答案
【单选题】If c is a codeword of a (n,k) cyclic code, the (n-k)-bit cyclic shift on c toward left gives .
A.
a redundent word .
B.
another codeword in this cyclic code
C.
another redundent word.
D.
the same codeword in this cyclic code
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【简答题】环式电子传递(cyclic electron transport)
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【简答题】环化核苷酸(cyclic nudeotide)
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【判断题】在三相全控桥式整流电路中，采用双窄脉冲触发晶闸管元件时，电源相序还要满足触发电路相序要求时，才能正常工作。
A.
正确
B.
错误
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【单选题】Dreamweaver 支持的音频文件类型有 ( )
A.
fla
B.
mp3
C.
au
D.
html
查看完整题目与答案
【多选题】How do GPCRs regulate intracellular cyclic AMP levels?
A.
Many extracellular signals acting via GPCRs affect the activity of the enzyme adenylyl cyclase and thus alter the intracellular concentration of the second messenger molecule cyclic AMP.
B.
Most commonly, the activated G protein α subunit switches on the adenylyl cyclase, causing a dramatic and sudden increase in the synthesis of cyclic AMP from ATP.
C.
To help terminate the signal, a second enzyme, called cyclic AMP phosphodiesterase, rapidly converts cyclic AMP to ordinary AMP. Cyclic AMP phosphodiesterase is continuously active inside the cell. Because it eliminates cyclic AMP so quickly, the cytosolic concentration of this second messenger can change rapidly in response to extracellular signals, rising or falling tenfold in a matter of seconds.
D.
Cyclic AMP is water-soluble, so it can, in some cases, carry the signal throughout the cell, traveling from the site on the membrane where it is synthesized to interact with proteins located in the cytosol, in the nucleus, or on other organelles. One way that caffeine acts as a stimulant is by inhibiting this phosphodiesterase in the nervous system, blocking cyclic AMP degradation and thereby keeping the concentration of this second messenger high.
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【单选题】Cyclic phosphorylation differs from noncyclic phosphorylation in that( )
A.
only cyclic phosphorylation yields NADP
B.
cyclic phosphorylation yields ATP while non-cyclic phosphorylation yields ATP and NADPH
C.
cyclic phosphorylation yields ATP and non-cyclic phosphorylation yields only NADPH
D.
only noncyclic phosphorylation yields ATP
E.
none of the above;there is no difference in end product or in the processes
查看完整题目与答案
【单选题】Dreamweaver支持的音频文件类型有( )
A.
.wav
B.
.mid
C.
au
D.
html
查看完整题目与答案
相关题目：
【单选题】以下不是Dreamweaver CS5所支持的音频文件类型是______。
A.
wav
B.
au
C.
mid
D.
html
查看完整题目与答案
【多选题】下面为Dreamweaver所支持的音频文件类型的是:
A.
wav
B.
mid
C.
au
D.
html
查看完整题目与答案
【单选题】If c is a codeword of a (n,k) cyclic code, the (n-k)-bit cyclic shift on c toward left gives .
A.
a redundent word .
B.
another codeword in this cyclic code
C.
another redundent word.
D.
the same codeword in this cyclic code
查看完整题目与答案
【简答题】环式电子传递(cyclic electron transport)
查看完整题目与答案
【简答题】环化核苷酸(cyclic nudeotide)
查看完整题目与答案
【判断题】在三相全控桥式整流电路中，采用双窄脉冲触发晶闸管元件时，电源相序还要满足触发电路相序要求时，才能正常工作。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Dreamweaver 支持的音频文件类型有 ( )
A.
fla
B.
mp3
C.
au
D.
html
查看完整题目与答案
【多选题】How do GPCRs regulate intracellular cyclic AMP levels?
A.
Many extracellular signals acting via GPCRs affect the activity of the enzyme adenylyl cyclase and thus alter the intracellular concentration of the second messenger molecule cyclic AMP.
B.
Most commonly, the activated G protein α subunit switches on the adenylyl cyclase, causing a dramatic and sudden increase in the synthesis of cyclic AMP from ATP.
C.
To help terminate the signal, a second enzyme, called cyclic AMP phosphodiesterase, rapidly converts cyclic AMP to ordinary AMP. Cyclic AMP phosphodiesterase is continuously active inside the cell. Because it eliminates cyclic AMP so quickly, the cytosolic concentration of this second messenger can change rapidly in response to extracellular signals, rising or falling tenfold in a matter of seconds.
D.
Cyclic AMP is water-soluble, so it can, in some cases, carry the signal throughout the cell, traveling from the site on the membrane where it is synthesized to interact with proteins located in the cytosol, in the nucleus, or on other organelles. One way that caffeine acts as a stimulant is by inhibiting this phosphodiesterase in the nervous system, blocking cyclic AMP degradation and thereby keeping the concentration of this second messenger high.
查看完整题目与答案
【单选题】Cyclic phosphorylation differs from noncyclic phosphorylation in that( )
A.
only cyclic phosphorylation yields NADP
B.
cyclic phosphorylation yields ATP while non-cyclic phosphorylation yields ATP and NADPH
C.
cyclic phosphorylation yields ATP and non-cyclic phosphorylation yields only NADPH
D.
only noncyclic phosphorylation yields ATP
E.
none of the above;there is no difference in end product or in the processes
查看完整题目与答案
【单选题】Dreamweaver支持的音频文件类型有( )
A.
.wav
B.
.mid
C.
au
D.
html
查看完整题目与答案