题目内容
下列关于STM32F1的说法,正确的是( )。
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【多选题】假设STM32的3个中断优先级如下设置, 中断源 抢占优先级 响应优先级 X 3 2 Y 2 2 Z 2 3 则下述说法正确的是( )。
Pair work: Work with your partner to complete the following dialogues, using the words and phrases in brackets. Make changes or additions where necessary.1. A: Why will oil cease to be the No. 1 problem of our time?B: The dawn of a new energy era is ____ . Oil prices are ____ because solar power is becomingcheaper. Besides, improvements in energy _____, while helping to create a clean _____ , are reducing waste and the demand for oil. (go down, environment, around the corner, efficiency)2. A: Why isn't it easy to solve the water problem?B: Because water is far _____ than energy. No other _____ water, so it is impossible to find _____ it. Besides, water demand is rising, but water supply is fluctuating as a result of climate change. (resource, complicated, alternative, replace)3. A: Why is it important for us to conserve water?B: Water is going to be the most contentious _____ of the 21st century. It will trigger geopolitical _____ . That's why water _____ is not only ____ our economy but also a task of _____ importance. (conservation, in the interest of, conflict, strategic, resource)
关于叠合梁的构造与配筋，下列说法错误的是
预制混凝土与后浇混凝土之间的结合面应设置粗糙面
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