问题
单项选择题
下列中间段支气管描述，哪项是错误的
A．介于右上叶支气管开口与中叶支气管开口间的一段支气管
B．是右主支气管的直接延续
C．无任何分支
D．其长度为2～3cm
E．其走行较水平
答案
参考答案：E
解析：中间段支气管走行陡峭、较直。
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下列中间段支气管描述，哪项是错误的
A．介于右上叶支气管开口与中叶支气管开口间的一段支气管
B．是右主支气管的直接延续
C．无任何分支
D．其长度为2～3cm
E．其走行较水平
参考答案：E
解析：中间段支气管走行陡峭、较直。
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| When you are in England, you must be very careful in the street because the traffic drives 1 . 2 you cross the street, you must look to the right first and then the left. If the traffic lights (交通灯) 3 the traffic must stop. Then the people 4 can cross the road carefully. If the traffic lights are green, the traffic can 5 . People on foot mustn't cross. In the morning and in the evening, when people go to or come from work, the streets are very 6 . The traffic is the most dangerous then. When you go by bus in England, you have to be careful, too. Always 7 the traffic moves on the left. So you must be careful. 8 first, or you will go the wrong way. In many English 9 , there are big buses with two floors. You can sit on the second floor. From there you can see the city very well. How 10 ! | ||||
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