设f(x)=x3,f(a-bx)的导数是( ) A.3(a-bx) B.2-3b

题型:选择题

问题:

设f(x)=x3,f(a-bx)的导数是(  )

A.3(a-bx)

B.2-3b(a-bx)2

C.3b(a-bx)2

D.-3b(a-bx)2

考点:导数的运算
题型:选择题

(1)某一种铁的氧化物,经分析知其中含氧30%,则该铁的氧化物的化学式为______.

(2)氯元素有多种化合价,在①Ca(ClO)2 ②HClO4  ③KClO3  ④Cl2  ⑤AgCl中,氯元素的化合价由高到低的顺序是______.

(3)50克镁、锌、铁的混合物与足够的稀硫酸反应的到混合溶液、蒸发后得218g固体(已换算成无水硫酸盐).反应生成氢气质量是______.

(4)向4只装有质量和质量分数均相同的稀硫酸试管中,分别加入适量的 ①Mg ②MgO  ③Mg(OH)2  ④MgCO3,反应完全后(反应物均完全反应),所得溶液的溶质质量分数相同的是______.

题型:选择题

家庭中的成员从原来家庭中间独立出来,个体接受亲子的分离,这个阶段在家庭周期中称为()

A.独立成人阶段

B.新婚成家阶段

C.养育新人阶段

D.子女成长阶段

E.家庭空巢阶段

题型:选择题

第二节:完形填空(共20小题;每小题1.5分,满分30分)  

阅读下面短文,掌握其大意,然后从所给的四个选项中,选出最佳选项。

In the wake of Chicago’s worst ever winter, when all of the rooftops were loaded, many overloaded with snow…Robert McGrath saw his wife run out to the backyard garage to    1   some boxes.

Seconds later he heard the    2  !

Looking out he saw the    3   of the garage had caved in(下塌). McGrath did not    4   for hat or coat…He ran from the house,    5   a snow shovel, and called out for neighbors to    6  

Yelling and    7  , with sweat freezing on his face---throwing snow and pulling away    8  ----he heard her voice and then saw her    9  . He kept digging, throwing and pulling…

And within minutes he had his wife in his arms and was    10   “Are you all right? Are you all right? I thought you were    11  .Oh baby, I love you so much!” She was    12  

What Robert McGrath did not    13   was this: Mrs. McGrath had gone into the garage through one door and    14   through another. She was    15   in the house when she looked out and saw her husband digging and    16   orders and throwing planks of wood,feverishly trying to    17   her. She could not let her gallant(英勇) rescuer    18  . So she put her coat on again and went outside and    19   entered the garage through the    20   door--and allowed her husband to be her hero.

36、 A、fetch                       B、put                    C、1ay                   D、fix  

37、 A、overload              B、accident             C、crash                    D、falling

38、 A、doors                      B、roof                     C、top                   D、wall

39、 A、search                   B、look                     C、hesitate                 D、stop

40、 A、snatched                  B、grabbed             C、robbed                D、carried

41、 A、escape                     B、run                       C、help                     D、move

42、 A、digging                 B、working                C、complaining         D、crying  

43、 A、bricks                     B、stones                   C、grass                    D、boards

44、 A、hand                       B、body                    C、face                 D、feet

45、 A、sobbing                B、questioning           C、tired                    D、happy

46、 A、missing                   B、hidden                  C、crazy                    D、hurt

47、 A、excited                   B、fine                     C、surprised             D、happy  

48、 A、find                        B、mind                    C、know                   D、care

49、 A、away                       B、up                     C、off                       D、out

50、 A、safe                        B、waiting                 C、watching              D、anxious

51、 A、receiving                 B、placing               C、giving                  D、shouting

52、 A、pull                        B、rescue                   C、uncover                D、protect

53、 A、in                          B、away                   C、up                        D、down

54、 A、finally                     B、unexpectedly         C、quietly                D、carefully

55、 A、back                       B、open                     C、front                   D、broken  

题型:选择题

在Word中,设置段落缩进不能使用_____。

A.菜单

B.工具栏

C.水平标尺

D.垂直标尺

题型:选择题

天疱疮为皮肤上出现张力性水疱,疱壁较厚。

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