题目内容
【题目】下列关于硅酸的说法正确的是( )
A.硅酸可以通过SiO2和水的化合反应制得
B.用反应Na2SiO3+2HCl===H2SiO3(胶体)+2NaCl制取硅酸是利用了可溶性酸制难溶性酸的原理
C.硅酸难溶于水,不能与NaOH溶液反应
D.硅胶可用作袋装食品的干燥剂
【答案】D
【解析】SiO2不溶于水也不能与水反应生成硅酸,A项错误;B项中反应是利用了强酸制弱酸的原理,B项错误;硅酸虽难溶于水,但可与强碱溶液反应生成硅酸盐,C项错误。答案选D。

【题目】阅读理解
阅读下列短文,从每题所给的四个选项 (A 、B 、C 和 D )中,选出最佳选项。
Miracles Happen 101 Inspirational Stories about Hope, Answered Prayers, and Divine Intervention Miracles happen every day! Miracles can happen to anyone at any time. You will be instructed by these personal stories of faith, prayer, and healing that show a higher power at work in our lives. | |
The Dating Game 101 Stories about Looking for Love and Finding Fairy tale Romance! Searching for "The One"? This fun new book about dating — whether it sparked a lifelong love or a laugh with friends — will give you a boost as you search for your soul mate. Read these 101 stories about how couples met, good and bad dates, maintaining the relationship, second chances, the Internet, and all the ups and downs of dating, love, and romance. For men and women from 21 to 91. | |
O Canada The Wonders of Winter 101 Stories about Bad Weather, Good Times and Great Sports Canadian winters are boring! But this collection will warm | |
Just Us Girls 101 Stories about Friendship for Women of All Ages A woman's friends are the family she picks for herself. Whether it's about something funny or serious, our friends are the first ones we think to call. They are a constant source of support and encouragement. This collection of 101 touching and amusing stories celebrates all that is special about the bonds that women share with their friends — the unique spirit of female friendship. You'll love reading and sharing these stories with your friends. |
【1】What do the four books have in common?
A.They all have 101 stories.
B.They are all about weather.
C.They are sold at the same price.
D.They are published at the same day.
【2】Which book should you buy if you are in love with somebody?
A.O Canada The Wonders of Winter.
B.Miracles Happen.
C.The Dating Game.
D.Just Us Girls.
【3】Where can we find the passage?
A.A news report.
B.An education column.
C.A
D.A tour guide.