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【单选题】
第二心音产生的原因是由于:A.
心室射血引起大血管扩张及产生的涡流发出的振动
B.
心肌收缩,由于二尖办和三尖办关闭和左右侧房-室血流突然中断所引起
C.
心舒张期,室内压迅速下降引起的振动
D.
心舒张期,动脉管壁弹性回缩引起的振动
E.
主要与主动脉瓣和肺动脉瓣的关闭有关
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【单选题】下列不存在的交易或者事项是( )。
A.
一项资产增加，一项所有者权益增加
B.
一项资产减少，一项负债减少
C.
一项负债增加，另一项负债减少
D.
一项负债增加，一项所有者权益增加
【单选题】It remains to be seen whether the reserves of raw materials in the year 2000 will be sufficient to supply a world economy which will have grown by five hundred percent. Southeast Asia alone will have ...
A.
A worldwide plan to conserve natural resources should be worked out.
B.
The energy consumption of the underdeveloped countries will increase greatly.
C.
The world economy will have greatly grown by the year 2000.
D.
There will definitely be not enough raw materials in the year 2000.
【多选题】肿瘤的二级预防里,适合进行筛检的肿瘤应具备什么特征
A.
发病率较高而且预后严重的恶性肿瘤
B.
应有能被检出的临床前期，最好是有能被检出的扩散前期
C.
有简便经济准确及可接受性强的早期发现的方法
D.
若早期发现，及时诊断治疗，有治愈的可能
【简答题】Healthy eating habits are one of the most important lessons a child learns. Parents can make a plan of action for each child’s nutritional needs. Creating healthy habits Breakfast is necessary to prov...
【单选题】Why does the author mention iPod in paragraph 7?
A.
Because the author wants to show that very few people have the ability to create such a spectacular brand.
B.
Because creating a product like iPod is the result of releasing our creative energy.
C.
Because the author tries to show that learning humanites can help people get familiar with the creative process.
D.
Because creating an iPod is displaying people's talent in a constructive manner.
【简答题】Nowadays, some students have dropped off school to start their own enterprises. They have their own idol: Bill Gates who has left Harvard to devote his energy to Microsoft and became the leader of the...
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