阅读材料回答问题。 材料一：欧洲一体化从一开始就跨越了自由贸易区阶段，于196

A poor farmer had a good friend. He was famous for the wonderful apple trees  that he grew.

One day,his friend gave him a young apple tree.The farmer was pleased with the gift,but he did not know where to plant it.

He was afraid that if he p;anted the tree near the road,strangers would steal the fruit.If  he planted the tree in one of his field,his neighbours would come at night and steal some of the apples.If he planted the tree near house,his children would eat the fruit.Finally he planted the tree in his woods. Without sunlight and good soil, the tree soom died.

Later his friend asked him why he planted the tree in such a poor place.”What ‘s the  difference?” the farmer said angrily and then told him what he had thought.

“Yes ,”said his friend,”but at least someone could enjoy the fruit.Now you not only have had no fruit ,but also you have destroyed a good apple tree!”

根据短文内容，判断正（T）误 (F)

小题1:The farmer’s friend was good at growing vegetables.

小题2:The farmer was unhappy to get the young apple  tree.

小题3:In the end, the farmer planted the tree in his woods.

小题4:The farmer knew where to plant the apple tree.

小题5:We learn “You can’t get anything if you don’t want to give “from the story.

玉米叶肉细胞中又CO₂“泵”，使其能在较低的CO₂浓度下进行光合作用，水稻没有这种机制。图19显示了在相同的光照和温度条件下，不同植物在不同胞间CO₂浓度下的光合速率。各曲线代表的植物情况见表4，其中人工植物B数据尚无。

根据表4及相关信息，图19中曲线②和曲线③所示光合速率的差异科说明（）。

在闭合性腹部损伤时判断有无内脏损伤最有用的检查方法是

A．X线腹部平片
B．血尿常规检查
C．超声波检查
D．腹腔穿刺

简述为便于长材料的装卸工作立井井口安全门的结构特点？

（CaO）≥60%，（FeO）≤1.0%，碱度为2～4呈白色的碱性渣叫（）。