它是“共和国第一部宪法”；它是新中国工业化的起步；它使五星红旗从此在联合国大厦前飘扬。

要求：①文中须包含上述材料中所反映的三个相关成就，并分别概括出各自的影响。②谈谈这些“第一”带给你怎样的感受。③史实准确，表述清晰流畅，不少于100字。

语法填空

    How do learning habits influence learning results?It's useful and necessary to discuss learning habits.There is a famous saying "Good habits lead to good endings",____ shows the importance of habits.

    "An apple a day keeps the doctor away." also____ (show) a healthy habit everyday helps to build up our body. Thus,good learning habits can help us gain great learning results,high scores and abundant knowledge____ (include).At first,learning habits form our ways of thinking and____ (attitude) to the content of our learning. ____ (obvious),a good habit can help us to speed up to reach our destinations.As we can see,developing a good habit is so important that In would like to introduce one kind of good learning habits—keeping____ learning diary every day. We can start the habit by____ (write) a learning summary and remember to record something impressive and meaningful. Keep it in mind____ gradually we can gain this good learning habit and benefit from it.

    What's____ (much),I find out that I still have some bad learning habits____ well. I can only concentrate on reading for a short time,and I will conquer this problem by spending more efforts on concentration practice.

    I believe that through my efforts,I can gain good learning results by having good habits.

We ____ (go) to the parkyesterday.

人体细胞中，一条染色体上有____个DNA分子，23对染色体上共有____个DNA分子．

①若 $a\parallel b$ ， $b\subset \alpha$ ，则 $a\parallel \alpha$ ；

②若 $a\parallel \alpha$ ， $b\subset \alpha$ ，则 $a\parallel b$ ；

③若 $a\parallel b$ ， $b\parallel \alpha$ ，则 $a\parallel \alpha$ .

其中正确命题的个数是（   ）