题干

阅读短文,完成表格。

    There are four seasons in a year in Canada. They are spring, summer, autumn and winter. In spring, the weather is warm and sunny. I like to fly kites. In summer, it's hot. I like to swim. I often wear a pair of glasses and a hat. In autumn, it's always cool. I like to go to the park and ride down the street with my friends. In winter, it's cold and snowy. I like to go outside to skate and ski with my friends. Sometimes we make a big snowman, and then we dance and sing around it.

Seasons

Weather

Like to do

Spring



Summer



Autumn



Winter



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答案(点此获取答案解析)

Seasons

Weather

Like to do

实验探究步骤

实验现象

结论

在两个集气瓶中装满水,用玻璃片盖住瓶口,倒放入水中.将塑料管小心插入集气瓶内,吹气

集气瓶中的水排出,集气瓶内充满气体

向一个盛空气的集气瓶和一个呼出气体的集气瓶中,各加入少量石灰水,振荡

石灰水在空气中____

石灰水在呼出的气体中____

人呼出气体中二氧化碳含量比空气中____

将燃着的木条分别插入盛空气和呼出气体的集气瓶中

木条在空气中____

木条在呼出的气体中____

人呼出气体中氧气含量比空气中____

取两玻璃片,对其中一片呼气,另一片放在空气中

空气中的玻璃片上____

呼气的玻璃片上____

人呼出气体中水蒸气的含量比空气中____