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【简答题】
A greeting is a way of saying 'Hello' to someone. People in different countries greet each other in different ways. Here are some. World Greetings Philippine The everyday greeting for friends is a handshake for both men and women. Men some­times pat each other on the back. Japan When people meet for the first time, they usually bow. In business, people also shake hands. In formal situations, people often exchange business cards. When you give a business card, give it with two hands. This is polite. Special note: In Japan, a smile can have different meanings. It usually means that the person is happy, or that the person thinks something is funny. But it can also mean that the person is embarrassed. New Zealand Usually, both men and women shake hands when they meet someone for the first time. Fun fact: If you see two people pressing their noses together, they are probably Maori. The Maori are the native people of New Zealand. This is their traditional greeting. Brazil Men often shake hands when they meet for the first time. When women meet, they kiss each other on the cheek. Women also kiss male friends to say hello. When you shake hands, look at the person in the eyes. This shows interest and friendliness. 小题1:In this passage, which of the following is NOT mentioned? A.Kisses. B.Hugs. C.Bows. D.Handshakes. 小题2:Of the five pictures above (a, b, c, d and e), which is the same way to greet each other in the four countries? A.a B.b C.c D.d 小题3:Which of the following is TRUE according to the passage? A.Both men and women shake hands in Brazil when they meet. B.Japanese won't smile until they feel very happy. C.The Maori often press their noses together to greet each other. D.In Philippine, people shake hands only when they meet for the first time.
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【判断题】当主量子数n=2时,角量子数l只能取1。()
A.
正确
B.
错误
【判断题】合理的营养意味着机体能够摄入保持身体健康所必须的所有营养成分。
A.
正确
B.
错误
【简答题】当主量子数n=2时,其角量子数l只能取1。 ( )
【单选题】如图2所示,匀强磁场的方向垂直纸面向里,匀强电场的方向竖直向下,有一正离子恰能以速率v沿直线从左向右水平飞越此区域.下列说法正确的是( ) 图2
A.
若一电子以速率v从右向左飞入,则该电子将沿直线运动
B.
若一电子以速率v从右向左飞入,则该电子将向上偏转
C.
若一电子以速率v从右向左飞入,则该电子将向下偏转
D.
若一电子以速率v从左向右飞入,则该电子将向下偏转
【判断题】合理的营养意味着机体能够摄入保持身体健康所必须的部分营养成分。
A.
正确
B.
错误
【简答题】当主量子数n=2时,其角量子数l只能取1。    (    )
【判断题】合理的营养意味着机体能够摄入保持身体健康所必须的所有营养成分。
A.
正确
B.
错误
【单选题】带正电粒子(不计重力)以水平向右的初速度v 0 ,先通过匀强电场E,后通过匀强磁场B,如图5甲所示,电场和磁场对该粒子做功为W 1 .若把该电场和磁场正交叠加,如图乙所示,再让该带电粒子仍以水平向右的初速度v 0 (v 0 2,则( )
A.
W 1 2
B.
W 1 =W 2
C.
W 1 >W 2
D.
无法判断
【判断题】合理的营养意味着机体能够摄入保持身体健康所必须的部分营养成分。
A.
正确
B.
错误
【单选题】关于噬菌体的叙述,下列哪项是错误的
A.
是侵袭微生物的病毒
B.
有严格的宿主特异性
C.
由核酸和蛋白质组成
D.
含有 DNA 和 RNA 两种核酸
E.
对理化因素的抵抗力比一般细菌强
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