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【单选题】
以下关于依曼计算机结构中,指令和数据表示形式的叙述中,正确的是:A.
指令和数据都以二进制形式存放
B.
指令以二进制形式存放,数据以十进制形式存放
C.
指令和数据可以从形式上加以区分
D.
指令和数据都以十进制形式存放
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举一反三
【单选题】The new measure will reduce the chance of serious injury in the event of an accident. The underlined part means______.
A.
if an accident can be prevented
B.
if an accident happens
C.
before an accident
D.
during an accident
【简答题】reduce the chance of a large loss by sharing risks ________
【单选题】B Spending two or three hours playing outdoors each day can reduce a child’s chance of becoming short-sighted, a research shows. It challenges (挑战) the belief that short- sightedness is caused by comp...
A.
2 hours.
B.
90 minutes.
C.
1 hour.
D.
30 minutes.
【单选题】It is implied that a man can reduce his chance of committing suicide if he ______.
A.
goes straight to the core of a problem
B.
does not allow himself to be influenced by his acquaintances
C.
consults a psychiatrist regularly
D.
changes the way he thinks about problems and interact with others
【简答题】X、Y、Z、Q、E、F六种元素中，X原子核外的M层中只有两对成对电子，Y原子核外的L层电子数是K层的两倍，Z是地壳内含量（质量分数）最高的元素，Q的核电荷数是X与Z的核电荷数之和，E在第二周期主族元素中电负性最大的元素。请回答下列问题： (1)XZ 2 与YZ 2 分子的立体结构分别是 和 ，相同条件下两者在水中的溶解度较大的是 （写分子式），理由是 ； (2)Q的元素符号是 ，它的核外电子排布式...
【简答题】Spending two or three hours playing outdoors each day can reduce(减少)a child’s chance of becoming short-sighted（近视）,research shows . It challenges the belif that short-sightedness is caused by computer...
【单选题】The new measure will reduce the chance of serious injury in the event of an accident.
A.
e underlined part means _________.
B.
if an accident happens
C.
if an accident can be prevented
D.
before an accident
E.
during an accident
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