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【简答题】
所谓自动下载就是指当单片机需要下载,直接点击ISP软件上的“ ”按钮,单片机开发板在自动下载电路的控制下, 进行冷启动,即先断开除了下载电路的所有 ,然后再打开电源,而不需要手动 电源开关的工作,然后把程序烧写到单片机的 中。整个下载过程中,开发板的电源主开关一直处于闭合状态。这种方法就叫自动下载。
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举一反三
【单选题】How has Rochester changed when he and Jane are reunited?
A.
He has a limp.
B.
He has gone insane.
C.
He has lost an eye and a hand.
D.
He has typhus.
【单选题】How does Jane meet Mr. Rochester?
A.
He is digging a ditch
B.
He is in the barn
C.
He is on horseback
D.
He is reading to Adele
【多选题】下列有关规划环境影响评价的各项原则内容所具有的含义的表述，正确的有( )。
A.
具有中立的第三方评价是贯彻科学、客观、公正原则的前提条件
B.
通过早期介入，可以及早将环境因素纳入到综合决策之中，以实现可持续发展目标
C.
评价结论的可操作性是规划环境影响评价工作是否有效的直接体现
D.
将具有共同的环境影响要素的相关规划置身于该要素(如水环境与水资源)的环境容量或环境承载力分析中，是整体性原则的体现
【单选题】听力原文： A researcher at the University of Rochester in New York has found that workers exposed to high levels of lead on the job have an increased risk of dying from brain cancer. Epidemiologist Edwin v...
A.
Automobile mechanics.
B.
Painters.
C.
Waiters.
D.
Heavy equipment mechanics.
【单选题】听力原文： A researcher at the University of Rochester in New York has found that workers exposed to high levels of lead on the job have an increased risk of dying from brain cancer. Epidemiologist Edwin V...
A.
Automobile mechanics.
B.
Painters.
C.
Waiters.
D.
Heavy equipment mechanics.
【单选题】Pick up your pen and draw your own invention. Maybe it will be_______ a real product one day!
A.
turned on
B.
turned down
C.
turned off
D.
turned into
【单选题】听力原文：A researcher at the University of Rochester in New York has found that workers exposed to high levels of lead on the job have an increased risk of dying from brain cancer. Epidemiologist Edwin va...
A.
Automobile mechanics.
B.
Painters.
C.
Waiters.
D.
Heavy equipment mechanics.
【单选题】正常人空腹血糖浓度为(单位:mmol/L):
A.
2.05～5.50
B.
3.00～5.50
C.
3.89～6.11
D.
4.16～6.55
E.
7.32～8.89
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