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【单选题】
某同学用重铬酸钾容量法测定铁时,最后的结果以百分含量报出,下列结果哪个是正确的写法( )。
A.
0.2
B.
0.18
C.
0.1804
D.
0.18043
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参考答案：
举一反三
【单选题】His mother didn't _____ his marriage ______Mileva.
A.
approve of, with
B.
approve, to
C.
approve of, to
D.
approve, with
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【判断题】服务质量包括从业人员质量、服务项目质量、餐厅卫生与清洁质量、员工工作质量以及保证服务质量的督导方法。
A.
正确
B.
错误
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【简答题】A rich man was near death and was very upset. He had worked so hard for his money ______ he dreamt he could take it with him to heaven.So he ______ (祈祷) to God his dream would come true. An angel appe...
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【单选题】His mother didn't think he was _____ enough to live on his own but his father didn't agree .
A.
married
B.
mature
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【单选题】There may be a need for retraining if you ecpect employers( )new technology.
A.
using
B.
use
C.
to use
D.
used
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【简答题】There may be a need for retraining if you ecpect employers( )new technology.
查看完整题目与答案
【单选题】There may be a need for retraining if you expect employees ____ new technology.
A.
to use
B.
used
C.
using
D.
having
查看完整题目与答案
【单选题】质量为 20 g 的子弹沿 x 轴正向以 500 m/s 的速率射入一木块后,与木块一起仍沿 x 轴正向以 50 m /s 的速率前进,在此过程中木块所受冲量的大小为
A.
9 N·s
B.
- 9 N·s
C.
10 N·s
D.
- 10 N·s
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【简答题】完形填空。 I have been blessed with the opportunity in my life. It took the near-death experience of my dad to make me realize that my purpose in life is to 1 others. My dad suffered from leukemia (白血病) in...
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【简答题】(本大题满分13分)如图，现有一块半径为2m，圆心角为 的扇形铁皮 ，欲从其中裁剪出一块内接五边形 ，使点 在 弧上，点 分别在半径 和 上，四边形 是矩形，点 在弧 上， 点在线段 上，四边形 是直角梯形．现有如下裁剪方案：先使矩形 的面积达到最大，在此前提下，再使直角梯形 的面积也达到最大. （Ⅰ）设 ,当矩形 的面积最大时，求 的值； （Ⅱ）求按这种裁剪方法的原材料利用率．
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相关题目：
【单选题】His mother didn't _____ his marriage ______Mileva.
A.
approve of, with
B.
approve, to
C.
approve of, to
D.
approve, with
查看完整题目与答案
【判断题】服务质量包括从业人员质量、服务项目质量、餐厅卫生与清洁质量、员工工作质量以及保证服务质量的督导方法。
A.
正确
B.
错误
查看完整题目与答案
【简答题】A rich man was near death and was very upset. He had worked so hard for his money ______ he dreamt he could take it with him to heaven.So he ______ (祈祷) to God his dream would come true. An angel appe...
查看完整题目与答案
【单选题】His mother didn't think he was _____ enough to live on his own but his father didn't agree .
A.
married
B.
mature
查看完整题目与答案
【单选题】There may be a need for retraining if you ecpect employers( )new technology.
A.
using
B.
use
C.
to use
D.
used
查看完整题目与答案
【简答题】There may be a need for retraining if you ecpect employers( )new technology.
查看完整题目与答案
【单选题】There may be a need for retraining if you expect employees ____ new technology.
A.
to use
B.
used
C.
using
D.
having
查看完整题目与答案
【单选题】质量为 20 g 的子弹沿 x 轴正向以 500 m/s 的速率射入一木块后,与木块一起仍沿 x 轴正向以 50 m /s 的速率前进,在此过程中木块所受冲量的大小为
A.
9 N·s
B.
- 9 N·s
C.
10 N·s
D.
- 10 N·s
查看完整题目与答案
【简答题】完形填空。 I have been blessed with the opportunity in my life. It took the near-death experience of my dad to make me realize that my purpose in life is to 1 others. My dad suffered from leukemia (白血病) in...
查看完整题目与答案
【简答题】(本大题满分13分)如图，现有一块半径为2m，圆心角为 的扇形铁皮 ，欲从其中裁剪出一块内接五边形 ，使点 在 弧上，点 分别在半径 和 上，四边形 是矩形，点 在弧 上， 点在线段 上，四边形 是直角梯形．现有如下裁剪方案：先使矩形 的面积达到最大，在此前提下，再使直角梯形 的面积也达到最大. （Ⅰ）设 ,当矩形 的面积最大时，求 的值； （Ⅱ）求按这种裁剪方法的原材料利用率．
查看完整题目与答案
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