看图操作步骤示意图，分析回答： 图甲图乙 (1)图中操作步骤是在生产实践中常见
题型：实验题
问题：
看图操作步骤示意图，分析回答：
图甲 图乙
(1)图中操作步骤是在生产实践中常见的 方式，其中图 属于芽接，图 属于枝接，都属于 生殖，
(2)①称为 ，②称为 。①与②结合时应当使①与②的 紧密结合，以确保①的成活。
⑶在图乙中若①表示鸭梨的芽，②表示凤梨的枝条，则将来所结果实应为 。
题型：实验题
Beijing had its biggest snowfall since 1951. Britain is suffering through its longest cold snap (寒潮) since 1981. And freezing weather is hitting the Deep South, including Florida’s orange groves and beaches.
Whatever happened to global warming?
Such weather doesn’t seem to fit with warnings from scientists that the Earth is warming because of greenhouse gases. But experts say the cold snap doesn’t contradict global warming at all—it’s just a temporary phenomenon in the long-term heating trend. “It’s part of natural variability,” said Gerald Meehl, a senior scientist. With global warming, he said, “we’ll still have record cold temperatures. We’ll just have fewer of them.”
Scientists say man-made climate change does have the potential to cause more frequent and more severe weather extremes. But experts did not connect the current cold snap to climate change.
So what is going on?
“We basically have seen just a big outbreak of Arctic air over populated areas of the Northern Hemisphere”, Arndt said.
In the atmosphere, large rivers of air travel roughly west to east around the globe between the Arctic and the tropics. This air flow acts like a fence to keep Arctic air restricted. But recently, this air flow has become bent into a zigzag (之字形) pattern, wandering north and south. If you live in a place where it brings air up from the south, you get warm weather. In fact, record highs were reported this week in Washington state and Alaska.
But in the eastern United States, like 
some other unlucky parts of the globe, Arctic air is coming from the north. And that’s how you get a temperature of 3 degrees in Beijing, a reading of minus-42 in mainland Norway, and 18 inches of snow in parts of Britain. The zigzag pattern arises naturally from time to time, but it is not clear why it’s so strong right now.
小题1:What is the best title of the text?
A．Freezing weather is hitting the Deep South.
B．We’ll still have record cold temperatures.
C．The air flow has become a zigzag pattern.
D．Cold snap doesn’t contradict global warming.小题2:With global warming, we will ______.
A．also meet with severe cold snap
B．have more hot temperatures forever
C．never experience cold temperatures
D．have more cold temperatures小题3:According to experts, the current cold snap ______.
A．suggests that the climate has changed greatly
B．is not related to the climate change
C．shows that the climate will turn cold
D．is affected by global warming小题4:Beijing had its biggest snowfall since 1951 because of ______.
A．a fence from the Arctic
B．a cooling trend in climate
C．a big outbreak of Arctic air
D．its large population小题5:We can conclude that ______.
A．not all the parts of the Northern Hemisphere are cold in face of the cold snap
B．the zigzag pattern arises naturally accidentally
C．Beijing will get cold weather next year
D．Washington state and Alaska will not face cold weather next year