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【多选题】
紫外分光光度法测定牛血清白蛋白( BSA )稀溶液的浓度实验,选择 280nm 处,用 1cm 的色皿测定,下列关于相关与回归的描述正确的是( )
A.
溶液的吸光度 A 与溶液浓度 C 之间呈线性相关；
B.
吸光度 A 与溶液浓度 C 两个变量的相关系数 r 接近 1 ；
C.
可以用已知浓度的 BSA 系列标准溶液从方法学的角度验证吸光度 A 与溶液浓度 C 的相关性 以及求得二者的回归方程；
D.
也可以用未知浓度的 BSA 系列供试溶液从方法学的角度验证吸光度 A 与溶液浓度 C 的相关性 以及求得二者的回归方程；
E.
对于一种分析方法，只要该方法的响应值与待测物质的质量或溶液浓度间是线性相关的，我们就可以利用该方法定量分析待测物质。
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参考答案：
举一反三
【单选题】1,某企业全年需要甲材料240吨,每次进货成本为40元,每吨材料储存成本为12元,则全年最佳进货次数为(
A.
A,3次
B.
4次
C.
C,6次
D.
9次
查看完整题目与答案
【单选题】1某企业全年需要甲材料240吨,每次进货成本为40元,每吨材料储存成本为12元,则全年最佳进货次数为()。
A.
3次
B.
4次
C.
6次
D.
9次
查看完整题目与答案
【单选题】he said ,“don’t do that again.”
A.
_____me____that again.
B.
Said to;not to do
C.
Said to;don’t do
D.
Told;don’t  do
E.
Told;not to do
查看完整题目与答案
【单选题】用以下几类工作填筑材料时基本工程性质由好到差的正确排列是( )
A.
砂性土——粉性土——黏性土
B.
砂性土——黏性土——粉性土
C.
粉性土——黏性土——砂性土
D.
黏性土——砂性土——粉性土
查看完整题目与答案
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You don't have to pay to watch it.
C.
You don't have to be a sportsman to take part in.
D.
The bus trip to the place of the competition is free.
查看完整题目与答案
【单选题】He said,"Don't do that again. " He ______ me _________ that again.
A.
said to; not to do
B.
said to; don't do
C.
told; don't do
D.
told; not to do
查看完整题目与答案
【单选题】(Topic sentence missing) Eric exercised each day for eight years to strengthen his muscles. S ometimes he rode his bicycle 100 miles a day! I n addition, he lifted weights, roller-skated (滑冰) , and “ ...
A.
The 1980 Winter Olympics was a spectacular event.
B.
Eric Heiden won five gold medals at 1980 Winter Olympics.
C.
Eric Heiden worked hard to get in shape for the 1980 Winter.
查看完整题目与答案
【判断题】六部是指吏部、户部、礼部、兵部、刑部、工部。
A.
正确
B.
错误
查看完整题目与答案
【多选题】In addition to C-S-H gel, hardened cement contains ( ).
A.
unreacted clinker
B.
Ca(OH)2
C.
aluminate hydrates
D.
aluminosulphate
查看完整题目与答案
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You can watch it without paying.
C.
You don't have to be a sportsman to take part.
D.
The bus trip to the place of the competition is free.
查看完整题目与答案
相关题目：
【单选题】1,某企业全年需要甲材料240吨,每次进货成本为40元,每吨材料储存成本为12元,则全年最佳进货次数为(
A.
A,3次
B.
4次
C.
C,6次
D.
9次
查看完整题目与答案
【单选题】1某企业全年需要甲材料240吨,每次进货成本为40元,每吨材料储存成本为12元,则全年最佳进货次数为()。
A.
3次
B.
4次
C.
6次
D.
9次
查看完整题目与答案
【单选题】he said ,“don’t do that again.”
A.
_____me____that again.
B.
Said to;not to do
C.
Said to;don’t do
D.
Told;don’t  do
E.
Told;not to do
查看完整题目与答案
【单选题】用以下几类工作填筑材料时基本工程性质由好到差的正确排列是( )
A.
砂性土——粉性土——黏性土
B.
砂性土——黏性土——粉性土
C.
粉性土——黏性土——砂性土
D.
黏性土——砂性土——粉性土
查看完整题目与答案
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You don't have to pay to watch it.
C.
You don't have to be a sportsman to take part in.
D.
The bus trip to the place of the competition is free.
查看完整题目与答案
【单选题】He said,"Don't do that again. " He ______ me _________ that again.
A.
said to; not to do
B.
said to; don't do
C.
told; don't do
D.
told; not to do
查看完整题目与答案
【单选题】(Topic sentence missing) Eric exercised each day for eight years to strengthen his muscles. S ometimes he rode his bicycle 100 miles a day! I n addition, he lifted weights, roller-skated (滑冰) , and “ ...
A.
The 1980 Winter Olympics was a spectacular event.
B.
Eric Heiden won five gold medals at 1980 Winter Olympics.
C.
Eric Heiden worked hard to get in shape for the 1980 Winter.
查看完整题目与答案
【判断题】六部是指吏部、户部、礼部、兵部、刑部、工部。
A.
正确
B.
错误
查看完整题目与答案
【多选题】In addition to C-S-H gel, hardened cement contains ( ).
A.
unreacted clinker
B.
Ca(OH)2
C.
aluminate hydrates
D.
aluminosulphate
查看完整题目与答案
【单选题】What is special about the rock climbing competition?
A.
A foreign team takes part in it.
B.
You can watch it without paying.
C.
You don't have to be a sportsman to take part.
D.
The bus trip to the place of the competition is free.
查看完整题目与答案
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