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【单选题】
51单片机串行通信波特率的单位是( )。A.
字节/秒
B.
位/秒
C.
字节/分钟
D.
位/分钟
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【简答题】A few days ago, I went to school with lots of books，hoping to get a locker (锁柜). Suddenly, it started raining heavily. I hurried to pay for my locker, but I was disappointed when they informed me they...
【简答题】编程练习:根据成绩,输出档次。(使用switch语句) [0,60) 不及格 [60, 80) 及格 [80,90) 良好 [90,100] 优秀 其它 输入有误。
【简答题】编程练习:根据成绩,输出档次。 [0,60) 不及格 [60, 80) 及格 [80,90) 良好 [90,100] 优秀 其它 输入有误。
【单选题】听力原文： In some countries, taking lots of days off work sick would get you fired and the idea of offering prizes for good attendance would be little more than a joke. But absenteeism has become a big pr...
A.
is now a big problem
B.
could lead to dismiss of the staff
C.
is not so serious as before
D.
is protected by the employment laws
【简答题】The Arts Cinema is open 7 days a week, showing lots of American and foreign films. Next week，it will show an Australian film called “Midnight Meeting”. It is set in Sydney in the 1960s. You can see th...
【单选题】听力原文： In some countries, taking lots of days off work sick would get you fired and the idea of offering prizes for good attendance would be little more than a joke. But absenteeism has become a big pr...
A.
is now a big problem
B.
could lead to dismiss of the staff
C.
is not so serious as before
D.
is protected by the employment laws
【简答题】A few days ago，I went to school with lots of books，hoping to get a locker (锁柜)．Suddenly，it started raining heavily. I hurried to pay for my locker，but I was disappointed when they informed me they onl...
【单选题】瑞士心理学家皮亚杰认为,人从出生到成人伴随认知结构的不断重构,形成几个按不变顺序相继出现的时期或阶段。当儿童凭借形象在头脑中进行“表象性思维”时,其认知发展到了
A.
感知运动阶段
B.
前运算阶段
C.
具体运算阶段
D.
形式运算阶段
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