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【简答题】
在500mL 0.1mol/L Na 2 SO 4 溶液中，含Na 2 SO 4 的质量为__________g，从该溶液中取出10mL，加水稀释到100mL，稀释后溶液中Na 2 SO 4 的物质的量浓度为__________________mol/L。
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参考答案：
举一反三
【单选题】在PH7.0时,下列哪种氨基酸带正电荷?___
A.
Glu
B.
Pro
C.
His
D.
Thr
查看完整题目与答案
【单选题】She is so helpful that she is always ready to help people in trouble . Which of the following is correctfor the underlined word in the sentence?
A.
/'tr37bl/
B.
/'tra7bl/
C.
/'trKbl/
D.
/'tr?bl/
查看完整题目与答案
【单选题】The passage supplies information to answer which of the following questions?
A.
Which species, human or dog, has greater numbers of the neurotransmitters that have been hypothetically linked to narcolepsy?
B.
At what age do human beings first experience the degenerative effects of narcolepsy?
C.
What role do human leukocyte antigens perform. for the human immune system?
D.
Why did Honda initially suspect that HLAs played a role in narcolepsy?
E.
Which of the researchers named in the passage isolated narcolepsy as a distinct syndrome?
查看完整题目与答案
【单选题】某氨基酸（pI为4.7）在下列哪种pH值时带正电荷：
A.
pH4.0
B.
pH5.0
C.
pH6.0
D.
pH7.0
E.
pH4.7
查看完整题目与答案
【单选题】小说《在酒楼上》的作者是()
A.
鲁迅
B.
郁达夫
C.
胡适
D.
冰心
查看完整题目与答案
【单选题】在视频中的胸腔积液穿刺抽液操作中,其穿刺点的选取部位是
A.
腋后线第7肋间
B.
肩胛线第8肋间
C.
锁骨中线第2肋间
D.
锁骨中线第3肋间
E.
腋中线第7肋间
查看完整题目与答案
【单选题】十二色相环中,相邻的两个颜色之间相隔( )度?
A.
45
B.
60
C.
30
D.
20
查看完整题目与答案
【单选题】情绪中比较深入持久、比较微弱的情绪体验被称为（）。
A.
心境
B.
应激
C.
激情
D.
社会情绪
查看完整题目与答案
【简答题】Can you answer a question which I want to ask and which is puzzling me ?英译汉
查看完整题目与答案
【单选题】Joan_____Tour Guide
A.
majors at
B.
majors with
C.
majors in
查看完整题目与答案
相关题目：
【单选题】在PH7.0时,下列哪种氨基酸带正电荷?___
A.
Glu
B.
Pro
C.
His
D.
Thr
查看完整题目与答案
【单选题】She is so helpful that she is always ready to help people in trouble . Which of the following is correctfor the underlined word in the sentence?
A.
/'tr37bl/
B.
/'tra7bl/
C.
/'trKbl/
D.
/'tr?bl/
查看完整题目与答案
【单选题】The passage supplies information to answer which of the following questions?
A.
Which species, human or dog, has greater numbers of the neurotransmitters that have been hypothetically linked to narcolepsy?
B.
At what age do human beings first experience the degenerative effects of narcolepsy?
C.
What role do human leukocyte antigens perform. for the human immune system?
D.
Why did Honda initially suspect that HLAs played a role in narcolepsy?
E.
Which of the researchers named in the passage isolated narcolepsy as a distinct syndrome?
查看完整题目与答案
【单选题】某氨基酸（pI为4.7）在下列哪种pH值时带正电荷：
A.
pH4.0
B.
pH5.0
C.
pH6.0
D.
pH7.0
E.
pH4.7
查看完整题目与答案
【单选题】小说《在酒楼上》的作者是()
A.
鲁迅
B.
郁达夫
C.
胡适
D.
冰心
查看完整题目与答案
【单选题】在视频中的胸腔积液穿刺抽液操作中,其穿刺点的选取部位是
A.
腋后线第7肋间
B.
肩胛线第8肋间
C.
锁骨中线第2肋间
D.
锁骨中线第3肋间
E.
腋中线第7肋间
查看完整题目与答案
【单选题】十二色相环中,相邻的两个颜色之间相隔( )度?
A.
45
B.
60
C.
30
D.
20
查看完整题目与答案
【单选题】情绪中比较深入持久、比较微弱的情绪体验被称为（）。
A.
心境
B.
应激
C.
激情
D.
社会情绪
查看完整题目与答案
【简答题】Can you answer a question which I want to ask and which is puzzling me ?英译汉
查看完整题目与答案
【单选题】Joan_____Tour Guide
A.
majors at
B.
majors with
C.
majors in
查看完整题目与答案
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