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【单选题】
The first true piece of sports equipment that man invented was the ball. In ancient Egypt, as everywhere, pitching(投掷) stones was a favorite children’s . But a badly thrown rock could hurt a child. Looking for something less erous to throw, the Egyptians made what were probably the first balls.
At first, balls were made of grass or leaves held together by vines (藤). Later they were made of pieces of animal skin sewed together and stuffed (塞满) with feathers or hay.
Even though the Egyptians were warlike, they found time for peaceful s. Before long they had developed a number of ball s, each with its own set of rules. Perhaps they played ball more for instruction than for fun. Ball playing was thought of mainly as a way to teach ’young men the speed and skill they would need for war.This selection says that the Egyptians played（）
A．many different s with balls
B．many different kinds of s
C．only one ball
D．different s with similar rules
B．many different kinds of s
C．only one ball
D．different s with similar rules
A.
The first true piece of sports equipment that man invented was the ball. In ancient Egypt, as everywhere, pitching(投掷) stones was a favorite children’s . But a badly thrown rock could hurt a child. Looking for something less erous to throw, the Egyptians made what were probably the first balls.
B.
At first, balls were made of grass or leaves held together by vines (藤). Later they were made of pieces of animal skin sewed together and stuffed (塞满) with feathers or hay.
C.
Even though the Egyptians were warlike, they found time for peaceful s. Before long they had developed a number of ball s, each with its own set of rules. Perhaps they played ball more for instruction than for fun. Ball playing was thought of mainly as a way to teach ’young men the speed and skill they would need for war.
D.
题目标签：投掷
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【单选题】The first true piece of sports equipment that man invented was the ball. In ancient Egypt, as everywhere, pitching (投掷) stones was a favorite children’s . But a badly thrown rock could hurt a chil...
A.
childish
B.
difficult
C.
not enjoyable
D.
worthwhile
【单选题】The first true piece of sports equipment that man invented was the ball. In ancient Egypt, as everywhere, pitching (投掷) stones was a favorite children’s . But a badly thrown rock could hurt a chil...
A.
many different s with balls
B.
many different kinds of s
C.
only one ball
D.
different s with similar rules
【单选题】有些人认为棒球中下手球的投掷方法没有危险。但1920年，由于投掷手卡尔的下手球击中卡查普曼，后者死于头部受伤，下手球的投掷方法应被禁止。 上述推理过程的错误在于( )
A.
将一普遍原理适用于一个特定的例子上
B.
混淆了原因和其产生的影响
C.
从一个特定的事例上得出一个普遍结论
D.
用个人而非逻辑的理由抨击了提倡者的意思
【单选题】有些人认为棒球中下手球的投掷方法没有危险。但1920年，由于投掷手卡尔的下手球击中卡查普曼，后者死于头部受伤，下手球的投掷方法应被禁止。 上述推理过程符合（ ）形式。
A.
这种训练计划能否普遍开展，专家们对此有不同的看法
B.
参加这项训练计划的学生并非随机抽取的，但是所有报名的学生并不知道实验计划将要包括的内容
C.
对照组在事后一直抱怨他们并不知道计划已经开始，因此，他们所填写的调查表因对未来有期待而填得比较忧惧
D.
填写社交忧惧调查表时，学生需要对约会的情况进行一定的回忆，男学生普遍对约会对象评价较为客观，而女学生则显得比较感性
【单选题】如果关于x的一元二次方程x2-2（a-3）x-b2+9=0中，a、b分别是两次投掷骰子所得的点数，则该二次方程有两个正根的概率P=（ ）
A.
118
B.
19
C.
16
D.
1318
相关题目：
【单选题】The first true piece of sports equipment that man invented was the ball. In ancient Egypt, as everywhere, pitching (投掷) stones was a favorite children’s . But a badly thrown rock could hurt a chil...
A.
childish
B.
difficult
C.
not enjoyable
D.
worthwhile
【单选题】The first true piece of sports equipment that man invented was the ball. In ancient Egypt, as everywhere, pitching (投掷) stones was a favorite children’s . But a badly thrown rock could hurt a chil...
A.
many different s with balls
B.
many different kinds of s
C.
only one ball
D.
different s with similar rules
【单选题】有些人认为棒球中下手球的投掷方法没有危险。但1920年，由于投掷手卡尔的下手球击中卡查普曼，后者死于头部受伤，下手球的投掷方法应被禁止。 上述推理过程的错误在于( )
A.
将一普遍原理适用于一个特定的例子上
B.
混淆了原因和其产生的影响
C.
从一个特定的事例上得出一个普遍结论
D.
用个人而非逻辑的理由抨击了提倡者的意思
【单选题】有些人认为棒球中下手球的投掷方法没有危险。但1920年，由于投掷手卡尔的下手球击中卡查普曼，后者死于头部受伤，下手球的投掷方法应被禁止。 上述推理过程符合（ ）形式。
A.
这种训练计划能否普遍开展，专家们对此有不同的看法
B.
参加这项训练计划的学生并非随机抽取的，但是所有报名的学生并不知道实验计划将要包括的内容
C.
对照组在事后一直抱怨他们并不知道计划已经开始，因此，他们所填写的调查表因对未来有期待而填得比较忧惧
D.
填写社交忧惧调查表时，学生需要对约会的情况进行一定的回忆，男学生普遍对约会对象评价较为客观，而女学生则显得比较感性
【单选题】如果关于x的一元二次方程x2-2（a-3）x-b2+9=0中，a、b分别是两次投掷骰子所得的点数，则该二次方程有两个正根的概率P=（ ）
A.
118
B.
19
C.
16
D.
1318
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