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【简答题】
● 在一个单 CPU 的计算机系统中，采用可剥夺式 （也称抢占式）优先级的进程调度 方案，且所有任务可以并行使用I/O 设备。下表列出了三个任务T1、T2、T3 的优先级、 独立运行时占用 CPU 和I/O 设备的时间。如果操作系统的开销忽略不计，这三个任务从同 时启动到全部结束的总时间为 （9）ms，CPU 的空闲时间共有 （10）ms 。
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参考答案：
举一反三
【单选题】听力原文：The global steel industry is in a mess. Overcapacity and weak demand have hurt producers. In 2002, 847 million tons of steel was produced, but consumption was only 765 million tons. Steel makers ...
A.
The steel industry still has a bright prospect on a global scene.
B.
Steel consumption in the world registered a drastic cut.
C.
Steel makers are drastically cutting down their production.
D.
Better promotion is needed for improving sales of steel products.
查看完整题目与答案
【单选题】America's economic recovery remains uncomfortably weak. The latest data show industrial production falling while the trade deficit soars to record levels. To round off a dismal week for economic stati...
A.
It is recovering.
B.
It faces an uncertain future.
C.
It remains depressing.
D.
It shows unreliable signs.
查看完整题目与答案
【多选题】法律义务的特点是( )
A.
法律义务是历史的
B.
法律义务源于现实需要
C.
法律义务必须依法设定
D.
法律义务可能发生变化
查看完整题目与答案
【单选题】烤箱按外形可分为通道式烤箱和（）。
A.
煤气烤箱
B.
柜式烤箱
C.
转动式烤箱
D.
固定式烤箱
查看完整题目与答案
【单选题】154既可用于瞄准,也可用于测微的是()式侧头
A.
电器接触
B.
非接触
C.
机械接触
D.
液压接触
查看完整题目与答案
【判断题】If a consumer maximizes a utility function subject to a budget constraint and has strictly convex preferences, then his behavior will necessarily satisfy the weak axiom of revealed preference and the ...
A.
正确
B.
错误
查看完整题目与答案
【单选题】At prices (4; 12); Harry chooses the bundle (9; 4). At the prices (8; 4); Harry chooses the bundle (2; 9). Is this behavior consistent with the weak axiom of revealed preference?
A.
Yes
B.
No
C.
t depends on his income
D.
We would have to observe a third choice to be able to say.
查看完整题目与答案
【单选题】下列关于法律关系的表述，不能成立的是（ ）
A.
法律关系属于社会关系
B.
法律关系是社会关系产生的前提
C.
没有法律规定就没有法律关系
D.
有些社会关系可以上升为法律关系
查看完整题目与答案
【单选题】烤箱按外形可分为柜式烤箱和（）。
A.
煤气烤箱
B.
转动式烤箱
C.
固定式烤箱
D.
通道式烤箱
查看完整题目与答案
【单选题】听力原文：The global steel industry is in a mess. Overcapacity and weak demand have hurt producers. In 2002, 847 million tons of steel was produced, but consumption was only 765 million tons. Steel makers ...
A.
The steel industry still has a bright prospect on a global scene.
B.
Steel consumption in the word registered a drastic cut.
C.
Steel makers are drastically cutting down their production.
D.
Better promotion is needed for improving sales of steel products.
查看完整题目与答案
相关题目：
【单选题】听力原文：The global steel industry is in a mess. Overcapacity and weak demand have hurt producers. In 2002, 847 million tons of steel was produced, but consumption was only 765 million tons. Steel makers ...
A.
The steel industry still has a bright prospect on a global scene.
B.
Steel consumption in the world registered a drastic cut.
C.
Steel makers are drastically cutting down their production.
D.
Better promotion is needed for improving sales of steel products.
查看完整题目与答案
【单选题】America's economic recovery remains uncomfortably weak. The latest data show industrial production falling while the trade deficit soars to record levels. To round off a dismal week for economic stati...
A.
It is recovering.
B.
It faces an uncertain future.
C.
It remains depressing.
D.
It shows unreliable signs.
查看完整题目与答案
【多选题】法律义务的特点是( )
A.
法律义务是历史的
B.
法律义务源于现实需要
C.
法律义务必须依法设定
D.
法律义务可能发生变化
查看完整题目与答案
【单选题】烤箱按外形可分为通道式烤箱和（）。
A.
煤气烤箱
B.
柜式烤箱
C.
转动式烤箱
D.
固定式烤箱
查看完整题目与答案
【单选题】154既可用于瞄准,也可用于测微的是()式侧头
A.
电器接触
B.
非接触
C.
机械接触
D.
液压接触
查看完整题目与答案
【判断题】If a consumer maximizes a utility function subject to a budget constraint and has strictly convex preferences, then his behavior will necessarily satisfy the weak axiom of revealed preference and the ...
A.
正确
B.
错误
查看完整题目与答案
【单选题】At prices (4; 12); Harry chooses the bundle (9; 4). At the prices (8; 4); Harry chooses the bundle (2; 9). Is this behavior consistent with the weak axiom of revealed preference?
A.
Yes
B.
No
C.
t depends on his income
D.
We would have to observe a third choice to be able to say.
查看完整题目与答案
【单选题】下列关于法律关系的表述，不能成立的是（ ）
A.
法律关系属于社会关系
B.
法律关系是社会关系产生的前提
C.
没有法律规定就没有法律关系
D.
有些社会关系可以上升为法律关系
查看完整题目与答案
【单选题】烤箱按外形可分为柜式烤箱和（）。
A.
煤气烤箱
B.
转动式烤箱
C.
固定式烤箱
D.
通道式烤箱
查看完整题目与答案
【单选题】听力原文：The global steel industry is in a mess. Overcapacity and weak demand have hurt producers. In 2002, 847 million tons of steel was produced, but consumption was only 765 million tons. Steel makers ...
A.
The steel industry still has a bright prospect on a global scene.
B.
Steel consumption in the word registered a drastic cut.
C.
Steel makers are drastically cutting down their production.
D.
Better promotion is needed for improving sales of steel products.
查看完整题目与答案
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