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Para 9. So, when I took my new boyfriend to dinner at Mom's house for the first time, I worried about what she would be serving. I could only hope that she had prepared something he would recognize and was willing to eat. When we got to the house, I was relieved to find out we were having chicken soup. Who doesn't like chicken soup? Para 10. With the pot of hot soup already on the dining room table, we sat down to eat and Mom began serving the soup. True to her upbringing , Mom made certain her guest was served first and she poured a large ladle of soup into his bowl. Then ... oh, no! Before I knew what was happening or could stop her, she added a special treat to his bowl. A chicken foot! Though my boyfriend was completely shocked and disgusted by the chicken foot in his soup, he did not say a word about it. But he didn't eat much soup, either!
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【单选题】设用频率为n1和n2的两种单色光，先后照射同一种金属均能产生光电效应．已知该金属的红限频率为n0，测得两次照射时的遏止电压|Ua2| = 2|Ua1|，则这两种单色光的频率有如下关系：
A.
n 2 = n 1 - n 0 ．
B.
n 2 = n 1 + n 0 ．
C.
n 2 = 2 n 1 - n 0 ．
D.
n 2 = n 1 - 2 n 0 ．
【单选题】***一个饱和黏性土试样,在三轴仪内进行不固结不排水试验,试问土样的破坏面在什么地方?( )
A.
与水平面呈90 °
B.
与水平面呈60 °
C.
与水平面呈75 °
D.
与水平面呈45 °
【单选题】一个饱和黏性土试样，在三轴仪内进行不固结不排水试验，则土样的破坏面在( )。
A.
与水平面呈30°角
B.
与水平面呈45°角
C.
与水平面呈60°角
D.
与水平面呈75°角
【单选题】有一饱和黏性土试样，进行三轴固结不排水试验，并测出孔隙水压力，可以得到一个总应力圆和有效应力圆，则比较可知( )。
A.
总应力圆大
B.
有效应力圆大
C.
两个应力圆大小相同
【单选题】设用频率为n1和n2的两种单色光，先后照射同一种金属均能产生光电效应．已知金属的红限频率为n0，测得两次照射时的遏止电压【图片】，则这两种单色光的频率有如下关系：
A.
n 2 = n 1 - n 0 ．
B.
n 2 = n 1 + n 0 ．
C.
n 2 = 2 n 1 - n 0 ．
D.
n 2 = n 1 - 2 n 0 ．
【简答题】本实训装置中变频器模块的L1、L2、L3连接( )?
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