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【单选题】
在带电的电流互感器二次回路上工作,可以()。A.
将互感器二次侧开路
B.
用短路匝或短路片将二次回路短路
C.
将二次回路永久接地点断开
D.
在电能表和互感器二次回路间进行工作答案: (B)用短路匝或短路片将二次回路短路 *7.电压互感器V/V接线,当V侧断线,若在二次侧带块三相三线有功电能时,各线电压是() (A) Uuv= Uvw= Uwu=100V (B) Uuv= Uvw= Uwu= 50V (C) Uuv=Uvw=50V、Uwu= 100V (D) Uuv= Uwu=100V、Uvw= 50V
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皮皮学刷刷变学霸
举一反三
【单选题】1) In which compartment of the cell does glycolysis occur?
A.
Mitochondrion
B.
Nucleus
C.
Soluble cytoplasm (cytosol)
D.
Rough endoplasmic reticulum
【单选题】下列会计差错中,影响营业利润这一项目金额的是()。
A.
将公允价值变动损益错登为“投资收益
B.
将营业外支出错登为“其他业务成本”
C.
将定额内损耗的存货盘亏错登为“销售费用”
D.
将出售原材料的成本错登为“主营业务成本”
【单选题】下列会计差错中 , 影响“营业利润 " 这一项目金额的是 ( ) 。
A.
将公允价值变动损益错登为 “投资收益”
B.
将营业外支出错登为 “其他业务成本”
C.
将定额内损耗的存贷盘亏错登为 " 销售费用 ”
D.
将出售原材料的成本错登为 “主营业务成本 "
【单选题】In an argumentative essay, you have to make some claims, especially those of fact, cause or effect, value, and policy. Which type does the following statement belong to?Does the use of cell phones in ...
A.
fact
B.
cause or effect
C.
value
D.
policy
【多选题】How does the cell determine which parts of the RNA transcript to remove during RNA splicing?
A.
Unlike the coding sequence of an exon, most of the nucleotide sequence of an intron is unimportant. Although there is little overall resemblance between the nucleotide sequences of different introns, each intron contains a few short nucleotide sequences that act as cues for its removal from the pre-mRN
B.
These special sequences are found at or near each end of the intron and are the same or very similar in all introns. The special sequences are recognized primarily by small nuclear ribonucleoproteins (snRNPs), which direct the cleavage of the RNA at the intron–exon borders and catalyze the covalent linkage of the exon sequences.
C.
Guided by these sequences, an elaborate splicing machine cuts out the intron in the form of a “lariat” structure, formed by the reaction of an adenine nucleotide. The removed intron is ually degraded in the nucleus.
D.
Unlike the other steps of mRNA production, RNA splicing is carried out largely by RNA molecules rather than proteins. These RNA molecules, called small nuclear RNAs (snRNAs), are packaged with additional proteins to form snRNPs. RNA molecules that catalyze reactions in this way are known as ribozymes. Together, these snRNPs form the core of the spliceosome, the large assembly of RNA and protein molecules that carries out RNA splicing in the nucleus.
【单选题】In which compartment of the cell does glycolysis occur?
A.
Mitochondrion
B.
Nucleus
C.
Soluble cytoplasm (cytosol)
D.
Rough endoplasmic reticulum
【单选题】In which compartment of the cell does glycolysis occur?
A.
Mitochondrion
B.
Nucleus
C.
Soluble cytoplasm (cytosol)
D.
Rough endoplasmic reticulum
E.
Smooth endoplasmic reticulum
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