那是因为下雪了。

____ ____it snowed．

用“/”划去括号内不正确的读音

诗(shī  sī)____              潋(liǎn  liàn)____

亦( yì yí)____               滟(yàn  yǎn)____

妆（zhuáng zhuāng）____     浓（nóng nòng)____

    In England, people often talk about the weather because they can experience four seasons in one day. In the morning the weather is warm just like in spring. An hour later black clouds come and then it rains hard. The weather gets a little cold. In the late afternoon the sky will be sunny, the sun will begin to shine, and it will be summer at this time of a day.

    In England, people can also have summer in winter, or have winter in summer. So in winter they can swim sometimes, and in summer sometimes they should take warm clothes.

    When you go to England, you will see that some English people usually take an umbrella (伞)or a raincoat with them in the sunny morning, but you should not laugh at them.

    If you don't take an umbrella or a raincoat, you will regret later in the day.

如图是人体三种血管比较图，下列说法正确的是（　　）