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【多选题】
What are the structure and function of spliceosome?A.
The intron splicing takes place within a large protein complex called a spliceosome, and these introns, the spliceosomal introns, are not assigned a group number. A spliceosome is made up of multiple specialized RNA-protein complexes called small nuclear ribonucleoproteins (snRNPs).
B.
Each snRNP contains one of a class of eukaryotic RNAs, 100 to 200 nucleotides long, known as small nuclear RNAs (snRNAs). Five snRNAs (U1, U2, U4, U5, U6) involved in splicing reactions are generally found in abundance in eukaryotic nuclei.
C.
In yeast, the various snRNPs include about 100 different proteins, most of which have close homologs in all other eukaryotes. In humans, these conserved protein components are augmented by more than 200 additional proteins.
D.
Spliceosomes are thus among the most complex macromolecular machines in any eukaryotic cell. The RNA components of a spliceosome are the catalysts of the various splicing steps. The overall complex can be considered a highly flexible nucleoprotein chaperone that can adapt to the great diversity in size and sequence of nuclear mRNAs.
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【单选题】Which of the following sentences has the word "last" with the same meaning and usage as that in the title "After the Virus, That May Not Last."?
A.
Much has changed since my last visit.
B.
She was the last to go to bed.
C.
The marriage had lasted for less than two years.
D.
The next tide would be even higher than the last.
【单选题】In the title "labour unrest", the word "unrest" means:
A.
social or political discontent or protest that disrupts the established order
B.
another way of saying "no rest"
C.
a disturbed, unsettled, or uneasy mental or emotional state
D.
a protest and a state of working longer hours
【单选题】We should consider what use can we make ______ such material.
A.
of
B.
from
C.
up
D.
in
【多选题】光子理论解释康普顿散射,说法正确的是
A.
单个光子与物质中弱束缚电子相互作用的结果
B.
康普顿散射过程是光子与自由电子的弹性碰撞
C.
作用过程动量和能量守恒
D.
康普顿波长就是散射线的波长
【单选题】In the title "People, Meet the Parents", how can people meet the parents?
A.
By corporate branding.
B.
By print and TV campaign.
【单选题】We should not use power verbs on our resume. True or false?
A.
True. We should not use them on our resume.
B.
False. We should use them on our resume.
【多选题】对碰撞和散射的理解正确的是 ( )
A.
两小球在光滑水平面上碰撞后粘在一起，因而不满足动量守恒定律
B.
在系统所受合外力为零的条件下，正碰满足动量守恒定律，斜碰不满足动量守恒定律
C.
微观粒子碰撞时并不接触，但仍属于碰撞
D.
微观粒子碰撞时虽不接触，但仍满足动量守恒定律
【简答题】What do "they" refer to in the title "Why They Came"?
【多选题】According to the song, what is the meaning of the title "blowin' in the wind"?
A.
The answer is so obvious and self-evident that it´s in plain sight, blowing everywhere.
B.
The answer is so unfixed that we could hardly get it.
C.
Different individuals have different answers.
D.
The answer is indeed in the wind and trying to understand is like trying to chase the wind: pointless.
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