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【单选题】
非选择性β受体拮抗剂propranolol的化学名是( )。
A.
1-异丙胺基-3-[对-(2-甲氧基乙基)苯氧基]-2-丙醇
B.
1-(2,6-二甲基苯氧基)-2-丙胺
C.
1-异丙胺基-3-(1-萘氧基)-2-丙醇
D.
1,2,3-丙三醇三硝酸酯
E.
2,2-二甲基-5-(2,5-二甲苯基氧基)戊酸
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参考答案：
举一反三
【单选题】关于形变,下列说法正确的是( )
A.
物体发生形变，一定受到力的作用
B.
物体发生的形变只有弹性形变
C.
用力压桌子，桌子是坚硬物体，不会发生形变
D.
橡皮泥受到挤压后变形，它的弹性很好
查看完整题目与答案
【单选题】患者女,63岁。因心前区剧烈疼痛2小时入院,诊断为急性前壁心肌梗死。该患者易发生的心律失常为
A.
心房颤动
B.
心室纤颤
C.
房性期前收缩
D.
房室传导阻滞
E.
室性期前收缩及室性心动过速
查看完整题目与答案
【单选题】患者女、63岁。因心前区剧烈疼痛2小时入院,渗断为急性前璧心肌梗死:该患者另发生的心律失常为
A.
心房颤动
B.
心室颤动
C.
房性期前收缩
D.
房室传导阻滞
E.
室性期前收缩及室性心动过速
查看完整题目与答案
【单选题】女性，63岁，患急性心肌梗死入院，除予心电监护、吸氧、解除疼痛、控制休克及抗心律失常等治疗外，同时给予极化液治疗，后者的目的是
A.
纠正心源性休克
B.
改善心肌缺血
C.
减少心律失常
D.
防止发生栓塞
E.
增强心肌收缩力
查看完整题目与答案
【单选题】患者，女，63岁，患急性心肌梗死入院，给予心电监护、吸氧、解除疼痛、控制休克及抗心律失常等治疗外，同时给予极化液治疗，后者的目的是
A.
纠正心源性休克
B.
改善心肌缺血
C.
减少心律失常
D.
防止发生栓塞
E.
增强心肌收缩力
查看完整题目与答案
【判断题】U2P1- 2. By the 1940s, James Watson and Francis Crick had discovered the structure of DNA.
A.
正确
B.
错误
查看完整题目与答案
【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.
查看完整题目与答案
【简答题】Listen and fill the blanks. U1 Opener(1).mp3 Look, can you guess what it is? It looks like 1 _____ sinking in the sea, but in fact it is a sketch of a future ocean exploration station. Called the SeaO...
查看完整题目与答案
【简答题】U15_P2_1_International Pricing and Terms of Sales.mp4 Complete the checklist according to structure of the short lecture in the given video 2 Yes No The Big Mac Index tells us that prices for the sa...
查看完整题目与答案
【判断题】实验中经常交流能减少错误,多做实验也可以减少错误。
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】关于形变,下列说法正确的是( )
A.
物体发生形变，一定受到力的作用
B.
物体发生的形变只有弹性形变
C.
用力压桌子，桌子是坚硬物体，不会发生形变
D.
橡皮泥受到挤压后变形，它的弹性很好
查看完整题目与答案
【单选题】患者女,63岁。因心前区剧烈疼痛2小时入院,诊断为急性前壁心肌梗死。该患者易发生的心律失常为
A.
心房颤动
B.
心室纤颤
C.
房性期前收缩
D.
房室传导阻滞
E.
室性期前收缩及室性心动过速
查看完整题目与答案
【单选题】患者女、63岁。因心前区剧烈疼痛2小时入院,渗断为急性前璧心肌梗死:该患者另发生的心律失常为
A.
心房颤动
B.
心室颤动
C.
房性期前收缩
D.
房室传导阻滞
E.
室性期前收缩及室性心动过速
查看完整题目与答案
【单选题】女性，63岁，患急性心肌梗死入院，除予心电监护、吸氧、解除疼痛、控制休克及抗心律失常等治疗外，同时给予极化液治疗，后者的目的是
A.
纠正心源性休克
B.
改善心肌缺血
C.
减少心律失常
D.
防止发生栓塞
E.
增强心肌收缩力
查看完整题目与答案
【单选题】患者，女，63岁，患急性心肌梗死入院，给予心电监护、吸氧、解除疼痛、控制休克及抗心律失常等治疗外，同时给予极化液治疗，后者的目的是
A.
纠正心源性休克
B.
改善心肌缺血
C.
减少心律失常
D.
防止发生栓塞
E.
增强心肌收缩力
查看完整题目与答案
【判断题】U2P1- 2. By the 1940s, James Watson and Francis Crick had discovered the structure of DNA.
A.
正确
B.
错误
查看完整题目与答案
【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.
查看完整题目与答案
【简答题】Listen and fill the blanks. U1 Opener(1).mp3 Look, can you guess what it is? It looks like 1 _____ sinking in the sea, but in fact it is a sketch of a future ocean exploration station. Called the SeaO...
查看完整题目与答案
【简答题】U15_P2_1_International Pricing and Terms of Sales.mp4 Complete the checklist according to structure of the short lecture in the given video 2 Yes No The Big Mac Index tells us that prices for the sa...
查看完整题目与答案
【判断题】实验中经常交流能减少错误,多做实验也可以减少错误。
A.
正确
B.
错误
查看完整题目与答案
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