根據(jù)首字母提示，補(bǔ)全下面信中所缺的單詞，使其意義完整。
Dear Henry,
Thank you for your  i.【小題1】 . I’m sorry I can’t v 【小題2】   you this week. I am r 【小題3】   busy. This evening I’m going to my c  【小題4】   birthday party. And t  【小題5】  , I have to go to the dentist, because I have a t 【小題6】 .  (Yuck!)   On W  【小題7】 , I have tennis training w【小題8】   the school team. And I have to study for my c  【小題9】   test on Thursday. On Friday evening, I’m going to the movies with some friends. W  【小題10】  you like to come to the movies with us on Friday ?
Write soon.
Sonia

任務(wù)型閱讀 (10)
Every year people celebrate the Spring Festival in China. It is usually in January or February. It’s the most important festival in China. So before it comes, everyone buys many things. And they often make a special kind of food called dumplings. It means(意思是) ‘come together’. Parents always buy new clothes for their children and children also buy presents for their parents.
On the Spring Festival Eve (除夕), all the family members come back home to have a big dinner. When they enjoy the meal, they give the best wishes to each other for the coming year. After dinner, all the family stay up until midnight to welcome the New Year. They sing, dance and play cards.
On the first day of the new year, people put on new clothes and visit their friends. They say ‘Happy New Year!’ to each other. They all have a good time during the festival.
1. When is the Spring Festival in China every year?
                                              
2. What do people do before the Spring Festival comes?
                                              
3. What do ‘dumplings’ mean?
                                              
4. What do children get from their parents ?
                                              
5. Do people have fun at the Spring Festival?
                                             

如圖，∠1、∠2、∠3、∠4是五邊形ABCD的外角，且∠1=∠2=∠3=∠4=70°，則∠AED的度數(shù)是          。

當(dāng)c= 2         時(shí)，關(guān)于x的方程2x²+8x+c=0有實(shí)數(shù)根．（填一個(gè)符合要求的數(shù)即可）

已知一組數(shù)據(jù)：7，2，x，8，1的極差為9，則x的值是-1或10          ．

在實(shí)數(shù)范圍內(nèi)定義一種運(yùn)算“*”，其規(guī)則為a*b=a²-b²，根據(jù)這個(gè)規(guī)則，方程（x+2）*5=0的解為x=3或x=-7         ．

用錘子以均勻的力敲擊鐵釘入木板．隨著鐵釘?shù)纳钊耄�鐵釘所受的阻力會越來越大，使得每次釘入木板的釘子的長度后一次為前一次的k倍（0＜k＜1）．已知一個(gè)釘子受擊3次后恰好全部進(jìn)入木板，且第一次受擊后進(jìn)入木板部分的鐵釘長度是釘長的，設(shè)鐵釘?shù)拈L度為1，那么符合這一事實(shí)的一個(gè)方程
是              。

如圖所示，兩塊完全相同的含30°角的直角三角板疊放在一起，且∠DAB=30°．有以下四個(gè)結(jié)論：①AF丄BC；②△ADG≌△ACF；③O為BC的中點(diǎn)；④AG：DE=：4，其中正確結(jié)論的序是①②③④         ．（錯(cuò)填得0分，少填酌情給分）．

課題研究小組對附著在物體表面的三個(gè)微生物（課題小組成員把他們分別標(biāo)號為1，2，3）的生長情況進(jìn)行觀察記錄．這三個(gè)微生物第一天各自一分為二，產(chǎn)生新的微生物（分別被標(biāo)號為4，5，6，7，8，9），接下去每天都按照這樣的規(guī)律變化，即每個(gè)微生物一分為二，形成新的微生物（課題組成員用如圖所示的圖形進(jìn)行形象的記錄）．那么標(biāo)號為100的微生物會出現(xiàn)在第         天。

計(jì)算
【小題1】()+(-1)-
【小題2】先化簡，再求值：