设向量a=(mx+m-1,-1),b=(x+1,y),m∈R,且a⊥b(1)把y

题型:解答题

问题:

设向量
a
=(mx+m-1,-1)
b
=(x+1,y)
,m∈R,且
a
b

(1)把y表示成x的函数y=f(x);
(2)若tanA,tanB是方程f(x)+2=0的两个实根,A,B是△ABC的两个内角,求tanC的取值范围.
考点:平面向量的应用
题型:解答题

Please come to my              birthday party at 6 p. m. on Saturday.[ ]

A. twelve   

B. twelfth   

C. twelveth   

D. twenty

题型:解答题

根据短文内容回答问题.

If a snake bites you, take a photo with your mobile phone! It may save your life. This is the surprising advice of a British cook.

One day Henry Jackson was working in a restaurant kitchen. He picked up a dish from the table, and suddenly a snake appeared…and bit him on the hand.

“I went to try to pick it up and it bit me again. I threw it across the kitchen, and it landed in the fridge. So I closed the door,” Mr. Jackson said.

Anyway, Mr. Jackson stayed cool and he took a photo of the snake with his mobile phone. Soon his hand began to ache and he went to hospital. Then his chest began to hurt. Doctors couldn’t say what was wrong because they didn’t know what kind of snake it was. Then Mr. Jackson remembered his mobile phone photo. The doctors sent it to London Zoo. When they knew the kind of snake, they could give Mr. Jackson the right medicine, and he left hospital the next day.

小题1:What did Mr. Jackson do after the snake bit him again?

________________________________________________

小题2:Why did Mr. Jackson close the fridge door?

________________________________________________

小题3:What did Mr. Jackson feel after taking a photo of the snake with his mobile phone?

__________________________________________________

小题4:Why couldn’t the doctors help Mr. Jackson at first?

小题5:What can you learn form the story?

_________________________________________

题型:解答题

下图是2004~2006年世界各种谷物的产量变化图。读图回答下列各题。

小题1:各种谷物产量变化表明世界

A.谷物总产量下降

B.农业劳动力减少

C.谷物需求量减少

D.谷物单产下降小题2:埃及是世界十大粮食进口国之一,保证该国粮食供需平衡的最佳措施是

A.提高粮食单产,加强国际合作

B.扩大耕地面积,提高人口素质

C.鼓励劳务输出,减少粮食消费

D.控制人口增长,调整饮食结构

题型:解答题

以下图片资料所反映的历史信息最能说明“太平天国是中国民主化进程中偏离轨道的插曲”这一观点的是()

A.A

B.B

C.C

D.D

题型:解答题

设有关系模式W(C,P,S,G,T,R),其中各属性的含义是:C为课程,P为教师,S为学生,G为成绩,T为时间,R为教室,根据定义有如下的函数依赖集:
F=C→G,(S,C)→G,(T,R)→C,(T,P)→R,(T,S)→R
W的规范程度最高达到______。若将关系模式W分解为3个关系模式W1(C,P),W2(S,C,G),W3(S,T,R,C),则W1的规范化程度最高可达到______,W2的规范化程度最高可达到______,W3的规范化程度最高可到达______。

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