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【单选题】
According to this passage, the experiment of Dr. Landgrebe and Dr. Frick
A.
has great scientific value.
B.
proves mobile phones can cause cancer.
C.
does not successfully prove the point of Dr. Landgrebe and Dr. Frick.
D.
shows that those who claim to be electrosensitive are lying about their symptoms.
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【单选题】某化合物的浓度为1.0×10^(-5)mol/L,在λmax=380nm时,其透射比为50%,用1.0cm吸收池,则在该波长处的摩尔吸收系数εmax/[L/(mol×cm)]为
A.
5.0×10^4
B.
2.5×10^4
C.
1.5×10^4
D.
3.0×10^4
【单选题】以下哪个不属于机构的特点
A.
有能量转换
B.
人创造出来的
C.
有确定运动的轨迹
【简答题】A.They begin paying federal taxes from that day. B.It is the last day for people to pay the city tax. C.It is the deadline for paying federal taxes. D.The state tax is due on that day.
【单选题】––How was your last day off? ––_______. It was windy and cloudy all day.
A.
Relaxing
B.
Terrible
C.
Fun
D.
Wonderful
【单选题】给一个已存在的文件用FileWriter("report")给其写入数据,则结果为?
A.
数据添加到文件中;
B.
文件内容被新内容替换;
C.
由于文件已存在,将抛出异常;
D.
数据写入到文件的随机位置。
【单选题】某化合物的浓度为1.0 ×10-5mol/L,在lmax=380nm时, 有透射比为50%, 用25px吸收池, 则在该波长处的摩尔吸收系数emax /[L/(mol×cm)]为( )
A.
5.0 ×10的4次方
B.
2.5 ×10的4次方
C.
1.5 ×10的4次方
D.
3.0×10的4次方
【单选题】某化合物的浓度为1.0 ×10-5mol/L,在lmax=380nm时, 有透射比为50%, 用1.0cm吸收池, 则在该波长处的摩尔吸收系数emax /[L/(mol×cm)]为
A.
5.0 ×10 4
B.
2.5 ×10 4
C.
1.5 ×10 4
D.
3.0 ×10 4
【单选题】【C13】
A.
the last day's
B.
the next day's
C.
the same
D.
a different
【简答题】简述机器人对传感器的基本性能要求。
【单选题】某化合物的浓度为 1.0 × 10 -5 mol/L, 在 l max =380nm 时 , 有透射比为 50%, 用 1.0cm 吸收池 , 则在该波长处的摩尔吸收系数 e max /[L/(mol × cm)] 为
A.
5.0 × 10 4
B.
3.0 × 10 4
C.
2.5 × 10 4
D.
1.5 × 10 4
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