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【单选题】
下列关于轮胎使用，描述不正确的是（）A.
轮胎磨损过甚会降低制动效果
B.
左右轮胎型号规格不同会影响车辆高速直线行驶的稳定性
C.
轮胎气压不足或左右轮胎气压不均匀会造成转向沉重
D.
夏季轮胎气压一般要比正常值低一些
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【单选题】Since the 1950's, literary critics have attempted to answer the question: When did children's literature first emerge as a distinct literary genre?
A.
improve
B.
appear
C.
conform
D.
respond
【简答题】Singing had always been an important part of Gloria Estefan’s life. “Since I was three years old, I sang. I sang everything,” Gloria said. “Cubans,” she added, “are a musical people”. Gloria was born ...
【简答题】Singing had always been an important part of Gloria Estefan’s life. “ Since I was three years old, I sang. I sang everything,” Gloria said. “Gubans,” she added, “are a musical people.” Gloria was born...
【单选题】The happy student was singing ____ he was going home. [ ]
A.
until
B.
as
C.
since
D.
and
【单选题】The following statements are true about the loss of the Arctic ice EXCEPT that ______
A.
the loss of the Arctic ice will affect both animals living there and all human beings
B.
the loss of the Arctic ice will make us feel warm in summer and cold in winter
C.
the Greenland Ice Sheet will melt and lose mass
D.
the Arctic ecosystem will become disordered
【简答题】已知函数f（x）= lo g 2 1+x 1-x ． （1）求函数f（x）的定义域； （2）判断函数f（x）的奇偶性，并证明； （3）判断函数f（x）在定义域上的单调性，并用定义证明．
【简答题】英汉互译。 1. listen to __________ 4. 关掉 __________ 2. turn up __________ 5. 中国音乐 __________ 3. turn on __________ 6. 另一个节目 __________
【简答题】forms slowly beneath other types of ice __________
【简答题】I’m good at singing. I’ve been interested in music and dreamed of become a singer ever since my childhood. My parents began to teach me children’s songs until I was only three. After I started school ...
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