问题
单项选择题
先根次序周游树等同于按哪一种方法周游二叉树
A．前序法
B．后序法
C．对称序法
D．后根次序
答案
参考答案：A
解析：先根次序周游树等同于按前序法周游二叉树。
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先根次序周游树等同于按哪一种方法周游二叉树
A．前序法
B．后序法
C．对称序法
D．后根次序
参考答案：A
解析：先根次序周游树等同于按前序法周游二叉树。
| 阅读理解。 | |||||
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| 1. You'll go to Sydney and only take _____ when you reach Beijing Airport at eleven forty. | |||||
| A. CA 923 B. CA 149 C. CA 167 D. CA 147 | |||||
| 2. If you want to fly to Paris and spend fourteen hours and ten minutes, you have to stop in _____ on the way. | |||||
| A. Hong Kong B. Shanghai C. Moscow D. Chengdu | |||||
| 3. It will take you _____ to reach London if you stop in Hong Kong. | |||||
| A. eleven hours and twenty B. twelve hours and fifty C. ten hours and thirty five D. ten hours and forty-five | |||||
| 4. You'd better take the plane at _____ if you want to spend the least time to get to Moscow. | |||||
| A. one fifteen B. twelve thirty-five C. seven forty-five D. seven twenty | |||||
| 5. There _____ for you to choose in Beijing if you want to go to New York. | |||||
| A. is only one plane B. are two planes C. are three planes D. aren't any planes |