同一性状的不同表现形式称为 。

读下图（某山脉18℃等温线空间分布图），完成下列小题。

小题1:该山脉最有可能是

A．台湾山脉

B．大分水岭

C．马达加斯加岛北部山脉

D．乌拉尔山小题2:据图分析，下列说法正确的是 

A．A地受沿岸暖流的影响，等温线分布高度大于B地

B．18℃等温线在A、B处分布的差异，主要是森林覆盖率的差异导致的

C．1000米处A侧气温比B侧高，是因A侧纬度低

D．B侧受暖空气影响强，导致B侧1000米气温与A侧1200米气温相等

血中抗壁细胞抗体阳性，常提示为（）

A.促胃液素瘤

B.浅表性胃炎

C.胃窦胃炎

D.胃体胃炎

E.胃黏膜脱垂症

急性溶血性输血反应最重要的体征为腰背痛。()

培土的作用是什么？

Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. They’re both poor though they work hard. Most villagers have built new houses, but they still live in the low and broken houses. They never find out why.
Once Uncle Li went to the town to buy some medicine for his wife. In the town he heard apples in a city were expensive. He told Uncle Wang about it as soon as he went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1,000 kilograms of apples in the villages and carried them to the city on a tractor. Bad luck! A lot of apples has already been carried there when they arrived. A few days later they had to sell them at a low price. They felt unhappy and returned to their village.
"I can’t understand why we sustained (蒙受) losses in business while others always profit (盈利)" Uncle Li asked one day.
"The tractor was too small" Uncle Wang said without thinking. "We’ll carry more apples on a truck next time!"
"I agree!" said Uncle Li. "How foolish we were!\

The two farmers had to sell their apples at a low price because ______.

A．theirs weren’t as good as the others’

B．theirs were much less than the others’

C．a lot of apples had been already carried to the city

D．they forgot to carry them on a truck