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【简答题】
已知向量 a =（2cosx，2sinx）， b = (cosx，- 3 cosx) ，函数f（x）= a ? b ， g(x)=f( π 6 x+ π 3 )+ax （a为常数）． （1）求函数f（x）图象的对称轴方程； （2）若函数g（x）的图象关于y轴对称，求g（1）+g（2）+g（3）+…+g（2011）的值； （3）已知对任意实数x 1 ，x 2 ， |cos π 3 x 1 -cos π 3 x 2 |≤ π 3 | x 1 - x 2 | 成立，当且仅当x 1 =x 2 “=”．求证：当 a＞ 2π 3 时，函数g（x）在（-∞，+∞）上是增函数．
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A.
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组织文化;
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公司架构;
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领导风格。
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The gravity model states that the trade flows between two countries is independent of the geographical distance between them.
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The gravity model emphasizes on the role of the government to generate adequate gains from trade.
C.
The gravity model states that trade flows between a developing and a developed nation is usually unidirectional.
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The gravity model states that the trade flows between two countries is directly proportional to their GDP.
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three-eighths
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third-eighth
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three-eighth
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third-eighths
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gravity用于设定控件中文本的位置
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layout_gravity用于设定控件在父控件中的位置
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在相对布局中layout_gravity不起作用
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在线性布局中layout_gravity不起作用
【单选题】It is said that the gravity on Mars is only about of the gravity on earth.
A.
three-eighths
B.
third-eighth
C.
third-eighths
D.
third-eight
【单选题】It is said that the gravity on Mars is only about __________ of the gravity on earth．
A.
three-eighths
B.
third-eighth
C.
three-eighth
D.
third-eighth
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