已知物体在倾角为α的斜面上恰能匀速下滑，则物体与斜面间的动摩擦因数是______

u A  LITTLE  PRINCESS Author: Frances Hodgson Burnett ￥18.3 (online) Motherless Sara Crewe was sent home from India to school at Miss Minchin’s. Her father was very rich and she lived a rich and comfortable life. Then her father died and Sara lost everything. She had to learn to do with her changed life. Her strong character made her able to fight successfully against her poverty(贫穷) and the scorn(嘲笑) of her fellows(伙伴). It’s an excellent book with 4 tapes(磁带) for children.
	u PETER  PAN Author: J.M Barrie ￥15 (in bookstores) ￥12 (online) It is a children’s story full of imagination and adventures(冒险), which is about Wendy, John, and Michael Darling’s adventures in Never-Never Land with Peter Pan, the boy who would not grow up. The children are happy and lovely. (with 2 tapes)
u UNCLE  TOM’S  CABIN(小屋) Author: Harriet Beecher Stowe ￥20 (in bookstores) The most famous novel in American history, Uncle Tom’s Cabin talked about the struggle between free states and slave(奴隶) states during the American Civil War(美国内战) and is as powerful today as when it first came out 150 years ago.
	u THE  SECRET  GARDEN Author: Frances Hodgson Burnett ￥35 (in bookstores) ￥30 (online) Mary Lennox, a sickly orphan(孤儿), finds herself in her uncle’s dark house. Why are so many rooms locked? Why is one of the gardens locked? And what is that crying she hears at night? Through the power of hope, friendship, and the magic of nature, the brave girl brings the house and a long-lost garden back to life.
	u GONE  WITH  THE  WIND(乱世佳人) Author: Margaret Mitchell ￥25 (in bookstores) ￥18 (online) Gone With the Wind is a best-seller, which tells a story that happened in the American Civil War. Scarlett O’Hara is a woman in the story who is full of energy. She is strong and saves her family but is very selfish at the same time.

根据短文内容，选最佳择答案, 并在答题卡上按要求作答。
小题1: All of the following books have children as their main characters except _____.

A．PETER PAN	B．GONE WITH THE WIND
C．A LITTLE PRINCESS	D．THE SECRET GARDEN

小题2: We can know from the passage that _________.

A．two of the above books are written by Frances Hodgson Burnett

B．we can buy 5 kinds of the above books in bookstores

C．there are only three books with tapes

D．THE SECRET GARDEN is ￥5 cheaper in bookstores than online

小题3: If you buy THE SECRET GARDEN and PETER PAN online, you have to pay _________.

A．￥30

B．￥12

C．￥50

D．￥42

小题4:Mary brings the house and a long-lost garden back to life with the help of ____.
a. the power of hope  b. friendship    c. her uncle      d. nature’s magic

A．a, b, c

B．a, c, d

C．a, b, d

D．all of the above

小题5:.How many stories happened in the American Civil War?

A．One

B．Two

C．Three

D．Four