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【简答题】
Steven drives a school bus, but his bus isn’t the same as other school buses because there aren’t any children on it. There are only dogs. Steven’s bus takes dogs to school at 8:00 in the morning and brings them back home at 5:30 in the afternoon. Steven takes the dogs to a dog school. There he teaches the dogs to do many things: sit down, stand up, bring the shoes to the master, keep the master from danger (危险). Many dogs go to Steven’s school—big dogs, small dogs, old dogs, young dogs. Steven says that young dogs can learn more quickly. 小题1:What do you know about Steven? A．He drives children to school. B．He teaches dogs in a school. C．He has a school for young children. D．He teaches children in a school. 小题2: What does Steven teach the dogs to do? A．Eat. B．Sleep. C．Run. D．Do things for their masters. 小题3: Where do the dogs sleep? A．In the school. B．On the bus. C．In the street. D．In their own homes. 小题4:Which kind of dogs is easy to teach? A．Young dogs. B．Old dogs. C．Strong dogs . D．Big dogs. 小题5:The best title (标题) for the passage is “_________”. A．How to Keep Dogs B．How to Drive a Bus C．A School for Dogs D．Taking Children to School
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【简答题】导管相关性血流感染是指带有血管内导管或拔出导管( )的患者出现( )或( ),并伴有发热大于 3 8 摄氏度 ) 、 寒颤 或 低血压 等感染表现,除血管导管外没有其他明显的感染源。实验室微生物学检查显示:外 周 静脉血培养 有 ( )或( )阳性;或者从导管段和外周血培养出( )、 ( )结果 致病菌。
【简答题】A．To give an example of natural shapes. B．To describe early sculpture. C．To illustrate their use as tools. D．To demonstrate their role as decorative objects.
【单选题】用0.1 mol/L HCl滴定0.1 mol/L NH3水(pKb = 4.7)的pH突跃范围为6.3~4.3, 若用0.1 mol/L HCl滴定0.1 mol/L pKb = 2.7的某碱, pH突跃范围为
A.
6.3~2.3
B.
8.3~2.3
C.
8.3~4.3
D.
4.3~6.3
【单选题】用0.1 mol/L HCl滴定0.1 mol/L NH3水(pKb= 4.7)的pH突跃范围为6.3~4.3,若用0.1 mol/L HCl滴定0.1 mol/L pKb= 2.7的某碱, pH突跃范围为( )
A.
4.3~6.3
B.
6.3~2.3
C.
8.3~2.3
D.
8.3~4.3
【单选题】用0.1 mol/L HCl滴定0.1 mol/L氨水(pKb = 4.7)的pH突跃范围为6.3~4.3， 若用0.1 mol/L HCl滴定0.1 mol/L pKb = 2.7的某碱，pH突跃范围为( )
A.
6.3~2.3
B.
8.3~2.3
C.
8.3~4.3
D.
4.3~6.3
【单选题】Why does the professor mention bones and shells?
A.
To give an example of natural shapes.
B.
To describe early sculpture.
C.
To illustrate their use as tools.
D.
To demonstrate their role as decorative objects.
【单选题】用 0.1 mol/L HCl 滴定 0.1 mol/L NH 3 (pKb = 4.7) 的 pH 突跃范围为 6.3-4.3 ,用 0.1 mol/L HCl 滴定 0.1 mol/L pKb = 2.7 的碱, pH 突跃范围为( )。
A.
6.3-2.3
B.
8.3-2.3
C.
8.3-4.3
D.
4.3-6.3
【单选题】用0.1mol/L HCl滴定0.1mol/L NH 3 （pK b =4.7）的突跃范围为6.3~4.3，若用0.1mol/L HCl滴定0.1mol/L pK b =4.7的某碱，pH的突跃范围为（）
A.
6.3~2.3
B.
8.3~2.3
C.
8.3~4.3
D.
6.3~4.3
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