若对于任意实数x总有f(-x)=f(x),且f(x)在区间(-∞,-1]上是增函

题型:选择题

问题:

若对于任意实数x总有f(-x)=f(x),且f(x)在区间(-∞,-1]上是增函数,则(  )
A.f(-
3
2
)<f(-1)<f(2)
B.f(2)<f( -
3
2
)<f(-1)
C.f(2)<f(-1)<f(-
3
2
)
D.f(-1)<f(-
3
2
)<f(2)
考点:函数的奇偶性、周期性分段函数与抽象函数
题型:选择题

先补全词语,再按要求分类。

( )精( ) 神         神采( ) ( )         蹑( ) 蹑( )  

大步( ) ( )         张( ) 搭( )         ( ) 首( ) 胸  

( ) ( ) 而谈        信( ) 开( )         ( ) 编( ) 造

1.描写人物动作的:________________________________

2.描写人物语言的:________________________________

3.描写人物神态的:________________________________

题型:选择题
计算下列各题:
(1)3
2
-
12
-2
2
+
3

(2)x(x2+3x-2)-(x3-2x);
(3)(a-2b)(a+b)+2b3÷b;
(4)已知x+y=5,xy=-6,求x2+y2的值.
题型:选择题

The Mountain Bike Supply Company had 500 units in its beginning inventory. Each of these units cost $ 5. During the period, Mountain Bike Supply first purchased 400 units at $ 6 each and then 200 units at $ 7 each. At the end of the period, Mountain Bike Supply had 600 units. What is the cost of goods sold and inventory for Mountain Bike Supply if it uses FIFO inventory valuation COGS Inventory ①A. $ 2500 $ 3100 ②B. $ 3200 $ 3800 ③C. $ 2500 $ 3800

A.

A.①

B.

B. ②

C.

C.③

题型:选择题

无变彩的欧泊石处理方法主要是()

A、染成黑色

B、注蜡

C、注塑

D、烟处理

题型:选择题

斗轮机的堆料工艺有()、()、()。取料工艺有()、()。

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