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【单选题】
嵌入式系统的特点是()
A.
嵌入式系统通常是形式多样、面向特定应用的软硬件综合体;
B.
嵌入式系统得到多种类型的处理器和处理器体系结构的支持;
C.
嵌入式系统通常极其关注成本;
D.
嵌入式系统有实时性和可靠性的要求;
E.
嵌入式系统使用的操作系统一般是适应多种处理器、可剪裁、轻量型、实时可靠、可固化的嵌入式操作系统;
F.
嵌入式系统开发不需要专门工具和特殊方法。
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参考答案:
举一反三
【单选题】若投资者对股票看好,他应该:( )
A.
多头认沽期权;
B.
空头认沽期权;
C.
空头认购期权;
D.
以上都不是;
【简答题】Where and when was the first McDonald ' s built? It was built in ____1____,California in ____2_____.
【单选题】When was the first umbrella used for protecting people from rain invented by Samuel Fox of England ?
A.
In the 1700s.
B.
In the 1800s.
C.
In the 1900s.
【简答题】Dr. James Barry was the first woman in England to go to medical school. When she was grow-ing up, women could not go to medical school. (77) So how did she become a doctor? She simply pretended that s...
【判断题】平板状塑件 容易翘曲变形, 常用支撑方式为点支撑或边框线支撑。
A.
正确
B.
错误
【简答题】某机械厂生产的铸件合格率为 90% ,则其合格率的标准差为( )。
【单选题】When was first identified?
A.
In the 1960s.
B.
In the 1970s.
C.
In the 1980s.
D.
In the 1990s.
【单选题】When printing was invented in the 1500 s, the ___ Bible was the first complete work printed.
A.
Latin
B.
English
C.
Aramaic
D.
Hebrew
【判断题】平板状塑件常用支撑方式为点支撑或边框线支撑。
A.
正确
B.
错误
【单选题】某机械厂生产的铸件合格率为 90%,则其标准差为( )
A.
0.9
B.
0.81
C.
0.09
D.
0.3
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