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【单选题】
某人根据置信度为 95% 对某项分析结果进行了计算,分析结果报告如下。表达方法合理的是 ( 结果为百分数 ):
A.
(25.45 ± 0.0)
B.
(25.48 ± 0.01)
C.
(25.48 ± 0.013)
D.
(25.48 ± 0.0135)
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参考答案:
举一反三
【单选题】In the center of the lake are two islands, one of which is ______, if not larger than, the other. [     ]
A.
twice as large
B.
as twice large
C.
twice as large as
D.
as twice large as
【单选题】荧光物质的荧光强度与该物质的浓度成线性关系的条件是
A.
单色光
B.
稀溶液
C.
入射光强度一定
D.
样品池厚度一定
【单选题】已知圆 与直线 相切,则 (   )
A.
B.
C.
D.
0
【单选题】荧光物质的荧光强度与该物质的浓度成线性关系的条件是
A.
复色光
B.
样品为浓溶液
C.
入射光强度不一定
D.
样品池厚度一定
【单选题】荧光物质的荧光强度与该物质的浓度成线性关系的条件是
A.
复色光
B.
ECL大于0.05
C.
入射光强度不一定
D.
样品池厚度一定
【单选题】. China has hundreds of islands, _____ is Taiwan.
A.
the largest of which
B.
of which largest
C.
which the largest
D.
in which the largest
【多选题】荧光物质的荧光强度与该物质的浓度成线性关系的条件是
A.
单色光
B.
Ecl≤0.05
C.
入射光强度 I 0 一定
D.
样品池厚度一定
【单选题】There are solid reasons for China to claim ownership of the Diaoyu Islands, which lie about 200 miles the eastern coast of our country.
A.
to
B.
on
C.
off
D.
of
【单选题】China has many islands, ____ the largest is Taiwan.
A.
in which
B.
at which
C.
of which
【单选题】China has thousands of islands, the largest ___ is Taiwan.
A.
in which
B.
which
C.
in that
D.
of which
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