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【简答题】
有一型号原子吸收分光光度计的光学参数如下:光栅刻度1200条 /mm ,光栅面积 50mm×50mm ,倒线色散率20 Å /mm,狭缝宽度有四挡可调: 0.05 、 0.1 、 0.2 和 2mm 。请问: ( 1 )该型号仪器的一级光谱理论分辨率是多少? ( 2 )欲将 K 404.4nm 和 K 404.7nm 两条谱线分开,所用狭缝宽度应为多少? ( 3 ) Mn279.48nm 和 Mn279.83nm 双线中,前者是最灵敏线,若用 0.1nm 和 0.2nm 的狭缝宽度分别测定 Mn279.48nm ,所得灵敏线是否相同?为什么?
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【单选题】What is the significance of McBurney's point?
A.
It is the point where the linea alba connects to the sternum.
B.
It is the body surface projection of the tip of vermiform appendix.
C.
It is between the right anterior superior iliac spine and the navel where incisions for appendectomies are made.
D.
It locates at the intersection point of the right costal arch and right midclavicular line.
E.
Fistulas and hernias often occur in this area which is marked by the symphysis pubis on one end, and the sternum on the other.
【简答题】What was inside the letter delivered by the postman?
【单选题】______________? What's your point?
A.
Do you understand?
B.
Can you get it?
C.
What are you talking about?
D.
Speak like him.
【单选题】Whether a dehumidifier works or not depends on the humidistat to what point it's set.
A.
Y
B.
N
C.
NG
【单选题】What‘s the main point of this passage? 查看材料
A.
There will be more electric vehicles on road in the future．
B.
Georgia's breaks for electric vehicles may be too good to last．
C.
Residents will benefit from lower taxes on electric vehicles．
D.
Electric vehicles will be replaced by individual gas-guzzlers．
【单选题】- What's your point of view on cloning (克隆)? - ______________
A.
No way.
B.
I am against it.
C.
No point.
D.
That's none of your business.
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