问题
选择题
| 为了保障行驶安全，一种新型双门电动公交车安装了如下控制装置：只要有一扇门没有关紧，汽车就不能启动．如果规定：车门关紧时为“1”，未关紧时为“0”；当输出信号为“1”时，汽车可以正常启动行驶，当输出信号为“0”时，汽车不能启动．能正确表示该控制装置工作原理的逻辑门是（ ） A．与门 B．或门 C．非门 D．与非门 |
答案
答案：D
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| 为了保障行驶安全，一种新型双门电动公交车安装了如下控制装置：只要有一扇门没有关紧，汽车就不能启动．如果规定：车门关紧时为“1”，未关紧时为“0”；当输出信号为“1”时，汽车可以正常启动行驶，当输出信号为“0”时，汽车不能启动．能正确表示该控制装置工作原理的逻辑门是（ ） A．与门 B．或门 C．非门 D．与非门 |
答案：D
When Mr. Hunt woke up in the morning, he felt his bedroom was very bright. He thought he ___ to turn off the light again. He sat up and tried to do that. And now he __ it was the sunlight. Mrs. Hunt went to see their daughter in the city two days ago. She cooked some food for him ____ she left. But Mr. Hunt hoped to have breakfast in a restaurant near the park. And then he could walk ___ the lake. He put on his clothes and went out. The sun was shining brightly in the sky and the ___ was fresh (清新的) . But people were busy and he could see only some old people and children. He went in the restaurant and sat down at a table, waiting for the ___. “Hi, Peter!” someone called him and he saw it was his ____ Richard. “Hi, Richard. Glad to meet you here.” “Glad to meet you, too,” said Richard. “I’m sorry , but I __ my wallet at home . So could you lend fifty dollars to me, please?” “Sure, but I have only twenty five dollars in my _.” “It doesn’t matter ,” said Richard , “ then you’ll owe(欠) me twenty-five dollars and I’ll owe you __ dollars , too . That’ll be fair (公平的) .”
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