问题 读图填空题

被子植物是现代植物界中种类多、分布广、适应性强的一个类群。被子植物的一个显著特征是具有真正的花,所以被子植物又叫有花植物。绝大多数被子植物不但可以通过双受精进行有性生殖,还可以利用营养器官进行无性生殖。下图为被子植物有性生殖图解。请据图回答下列问题:

(1)植物的生殖分为有性生殖和无性生殖两类,两者的区别在于有无                    

(2)不同植物开花的时间不同。影响花开放的外界因素主要是                    

(3)被子植物的有性生殖需要依次完成                       等生理过程。

(4)从进化上看,有性生殖比无性生殖高等,更有利于植物                     。但无性生殖可以在较短时间内获得大量性状一致的个体,并能保持                      

答案

(1)精子和卵细胞的结合

(2)光照和温度

(3)开花、传粉、受精

(4)度过不良的环境(或生存)           亲本的优良性状

单项选择题
阅读理解

There is a story of a country where the rate of inflation(通货膨胀率)is so high that clever people pay for a taxi ride before, instead of after the trip. The story may or may not be true. But inflation was up so fast that by the end of 1923, they were 50 billion percent higher— a rise of almost 2500% a month.

There was so much paper money, and it had so little value that people carried bags full of money around to pay for things. One woman tells the story of standing outside a shop with a basket full of 500, 000 mark notes(马克). She wanted to buy just one piece of meat, and she hoped she had enough money. But when she was looking, a thief robbed(抢劫)her. He didn’t take her money; however, he threw it away and took the basket instead.

At first workers demanded to be paid every day. But as the situation became worse, they had to be paid twice a day. but they had to run out and spend the money at once, or it would lose its value. People bought anything that was for sale but food was almost impossible to find. Farm workers refused to take money. They wanted to be paid in potatoes instead.

New policies (政策) ended the inflation in 1923 when the government introduced a new money. But about half of the German people lost everything in those three and a half years.

小题1:According to the passage, in Germany the prices in 1920 were _______.

A.the lowest in history

B.the highest in history

C.higher than those in 1923

D.lower than those in 1923小题2:The thief stole the basket instead of the money in it because he thought_______.

A.the basket was what he needed most

B.the money was of no value

C.the basket was more valuable than the money

D.he couldn’t” t buy a piece of meat with the money小题3:The farm workers demanded to be paid in potatoes because they believed that_______.

A.the potato was valuable

B.the money might lose its value

C.the potato was too expensive

D.the money could not buy potatoes小题4:Which of the following best shows the inflation in Germany between 1920 and 1923?