已知三角形的两边长分别是4和10，则此三角形第三边长可以是（ _爱下问搜题

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问题选择题

已知三角形的两边长分别是4和10，则此三角形第三边长可以是（）．

A．15

B．12

C．6

D．5

答案

答案：B

题目分析：先根据三角形的三边关系求得此三角形第三边长的范围，即可作出判断.

∵三角形的两边长分别是4和10

∴此三角形第三边长大于且小于

故选B.

点评：解题关键是熟练掌握三角形的三边关系：三角形的任两边之和大于第三边，任两边之差小于第三边.

完形填空

Mr. Glen is a millionaire. Five years ago, after returning from abroad to his motherland, he ___36___his small company. Speaking of success, Glen often tells us a story about his extra expensive “school” fee. He always ___37___his success to it.
At that time, Glen, who already got a Ph.D. degree, ___38___to return to the homeland, starting a company. Before leaving, he bought a Rolex watch with the ___39___made through years of work after school and the scholarships. At the airport he had to accept the ___40___customs check. The watch on his wrist was also demanded to be taken down for ___41___. Glen knew that carrying the specific goods out had to pay the tax, and he worried about paying ___42___for his watch. So when he was checked, he told a lie that his watch was a ___43___fake（假货）. When he was ___44___of his “smarts”, immediately, in the presence of Glen, the officers hit the watch, ___45___cost nearly 100,000 into pieces ___46___hearing Glen’s words. Glen was ___47___. Before he understood why, he was taken to the office to be examined ___48___. For many times of entry-exit ___49___he knew that only those people in the “blacklist” would “enjoy” this special treatment. The officers looked over everything carefully in the box, and ___50___him no matter what time of entry and exit he must accept the check and if __51___reusing and carrying fake and shoddy goods, he would be ___52 __according to law! Suddenly, his face turned red, and he had nothing in mind after boarding the plane for long.
After returning to the homeland, he often told the story to his family, and his employees, too. He said that this made a deep ___53___on him, because the additional high “school” fee that he had ever paid made him realize the value of ___54__, which he would remember as the ___55___of his success forever.

A．Disappointed

B．experiences

C．experiments

单项选择题

在发动机起动工况时，ECU主要参考（）信号决定喷油量的大小。

A、空气流量计

B、水温传感器

C、节气门位置传感器

D、进气温度传感器