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【简答题】
“在一个有空气的密闭的玻璃瓶内,放一只老鼠,只见它在瓶内神态自若,情况正常。然后抽去瓶内空气,老鼠马上死亡。这可证明,没有空气是老鼠死亡的原因。”这个实验用了哪种探求因果联系的逻辑方法。
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【简答题】阅读理解。 An idea that started in Seattle's public library has spread throughout America and beyond. The concept is : help to build a sense of community in a city by getting everyone to read the sam...
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【单选题】一男孩,14岁,迅速长高,喉结发育。以下哪项不是青春期的特点:
A.
易出现种种心理冲突
B.
生殖系统发育加速并渐成熟
C.
体格发育再次加速
D.
患病率和死亡率较高
E.
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【简答题】以下哪项不是青春期的特点
【单选题】以下哪项不是青春期的发育特点
A.
体格生长发育再次加速
B.
生殖系统发育加速并渐趋成熟
C.
女孩的青春期开始和结束年龄比男孩晚 2年左右
D.
青春期的进入和结束存在较大个体差异，约可相差 2~4岁
E.
女孩的青春期开始和结束年龄比男孩早 2年左右
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