、抛物线y=3(x-2)2+1现象上平移2个单位,再向左平移2个单位所得的解析式

题型:选择题

问题:

、抛物线y=3(x-2)2+1现象上平移2个单位,再向左平移2个单位所得的解析式为(   )

A.y=3x2+3

B.y=3x2-1

C.y=3(x-4)2+3

D.y=3(x-4)2-1

考点:二次函数的定义二次函数的图像二次函数的最大值和最小值求二次函数的解析式及二次函数的应用
题型:选择题

国道主干线由“五纵七横”12条线路组成,其中“七横”是指上海至成都、上海至西安、上海至瑞丽、丹东至拉萨、青岛至银川、绥芬河至满洲里和衡阳至昆明等7条东西走向国道主干线。()

题型:选择题

阅读理解。

     "People should have one meat-free day a week if they want to make a personal and effective sacrifice that

would help deal with climate change," the world's leading authority on global warming has told The Observer.

     Dr Rajendra Pachauri, chair of the United Nations Intergovernmental Panel on Climate Change, said that

people should then go on to reduce their meat consumption even further.

     Pachauri, who was re-elected the panel's chairman for a second six-year term last week, said diet change

was important because of the huge greenhouse gas emissions (排放) and other environmental problems

associated with raising cattle and other animals. "It was relatively easy to change eating habits compared to

changing means of transport," he said.

     The UN's Food and Agriculture Organisation has estimated that meat production ac counts for nearly a

fifth of global greenhouse gas emissions. These are produced during the production. For example, ruminants

(反刍动物), particularly cows, emit a gas called methane, which is 23 times more effective as a global

warming agent than give off CO2.

     Pachauri can expect some opposite responses from the food industry to his advice, though last night he

was given unexpected support by Masterchef presenter and restaurateur John Torode. "I have a little bit and

enjoy it," said Torode. "Too much for any person is bad. But there's a bigger issue here: where the meat

comes from. If we all bought British and stopped buying imported food, we'd save a huge amount of carbon

emissions."

     Professor Robert Watson, the chief scientific adviser for the Department for Environment Food and Rural

Affairs, said government could help educate people about the benefits of eating less meat, but it should not

regulate. "Eating less meat would help, there's no question about that," Watson said.

     However, Chris Lamb, head of marketing for pig industry group BPEX, said the meat industry had been

unfairly targeted and was working hard to find out which activities had the biggest environmental impact and

reduce them. "Some ideas were contradictory," he said. "For example, one solution to emissions from cattle

and other animals was to keep them indoors, but this would damage animal welfare. Climate change is a very

young science and our view is ther are a lot of simple solutions being proposed."

1. What is directly related to global warming?

A. Consumption of meat.

B. Growth of cattle.

C. Methane from ruminants.

D. Processing of meat.

2. Who holds a view opposite to the others' in the passage?

A. Rajendra Pachauri.

B. John Torode.

C. Robert Watson.

D. Chris Lamb.

3. It is implied in the passage that _____.

A. we should try to keep away from cattle

B. ruminants should not be left outdoors

C. the meat industry will soon close down

D. we must do our duty to save the earth

4. Which of the following might be the best title for the passage?

A. Less meat, slower global warming

B. More animals, more greenhouse gas

C. Less imported food, better our environment

D. Greater diet change, smaller climate change

题型:选择题

女性,20岁,因半年来反复出现少量紫癜来诊。血红蛋白110g/L,白细胞3.8×10/L,血小板50×10/L,肝脾不大,骨髓穿刺3次,其中两次为增生活跃,分类大致正常,巨核细胞增生低下,Ham试验(-)。

其最可能的诊断为()

A.特发性血小板减少性紫癜

B.再生障碍性贫血

C.白细胞减少性白血病

D.阵发性睡眠性血红蛋白尿

E.脾功能亢进

题型:选择题

下列关于队列的叙述中正确的是______。

A.在队列中只能插入数据

B.在队列中只能删除数据

C.队列是先进先出的线性表

D.队列是先进后出的线性表

题型:选择题

舌色枯白无华,多属()

A.气血调和

B.阳虚水湿内停

C.气血两虚

D.阴液匮乏

E.脱血夺气

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