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问题 判断题

正等轴测图的3个轴间角都是120°，所以在3个方向上的椭圆长、短轴之比不等。

答案

参考答案：错

选择题
已知偶函数y=f（x）对任意实数x都有f（x+1）=-f（x），且在[0，1]上单调递减，则（　　）
A．f(
7
2
)＜f(
7
3
)＜f(
7
5
)		B．f(
7
5
)＜f(
7
2
)＜f(
7
3
)
C．f(
7
3
)＜f(
7
2
)＜f(
7
5
)		D．f(
7
5
)＜f(
7
3
)＜f(
7
2
)
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选择题

---You were tired out after the mountain climbing, weren't you?

---Yes, ______. I could hardly rise to my feet.

A．not at all

B．not a little

C．not a bit

D．not really
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