如图所示，用大小相等、方向相反，并在同一水平面上的力N挤压相同的木板，木板中间夹着两块相同的砖，砖和木板均保持静止，则（   ）

如图所示，实线和虚线分别表示振幅、频率均相同的两列波的波峰和波谷．此刻，M是波峰与波峰相遇点，下列说法中正确的是（   ）

分离出某腺体细胞放入含有放射性标记的氨基酸的培养液中培养，培养液中含有细胞所需的一切物质，很快连续取样，并分离核糖体、内质网和高尔基体．测定标记的氨基酸出现在核糖体、内质网和高尔基体中的情况．结果如图所示．请回答：

（1）放射性氨基酸首先在核糖体上大量累积，最可能的解释是____ ．

（2）放射性氨基酸继在核糖体上积累之后，在内质网中也出现，且数量不断增多，最可能的解释是____ 

（3）在高尔基体是含量随后上升的最可能的解释是____ ．

（4）实验中，培养液相当于人体中的____ 

（5）如果该腺体为胰腺细胞，可分泌胰酶和胰岛素，则____ 可进入血液，参与物质代谢的调节；如果该物质分泌不足，可使血液中____ 的浓度升高，导致____ 病．这种胰岛素从高尔基体分泌到细胞外，与细胞膜的____ 特点有关．

One day when some government officials(官员) were building a barn(谷仓), they found a mouse hole in a corner and used smoke to make the mice inside the hole come out. A while later they indeed saw mice running out, one after another. Then, everyone thought that all the mice had escaped. But just as they began to clean up, they saw two mice squeezing(挤)out at the mouth of the hole. With some efforts, the mice finally got out. However, it was strange that after they came out of the hole, they didn’t run away immediately. Instead, one chased after the other near the mouth of the hole. It seemed that one was trying to bite the tail of the other.
Everyone was puzzled(困惑), so they stepped near to take a look. They realized that one of the mice was blind and couldn’t see anything, and the other was trying to allow the blind mouse to bite on his tail so that he could pull the blind one with him to escape.
After seeing what happened, everyone was speechless and lost in thought. During the meal time, the group of people sat down in a circle and started to chat about what happened to the two mice.
One serious American official said, “I think the relationship between those mice was that of king and guard(卫兵).” The other thought for a while and said, “That is why!”
A smart Frenchman said, “I think the relationship between those two mice was that of husband and wife.” Again the others thought for a while, and all felt it made sense.
A Japanese said, “I think the relationship between those two mice was that of mother and son.” Once again the others thought for a while, and felt this was more reasonable. So they expressed(表达) agreement another time.
At that moment, one Chinese asked, “Why did those two mice have to have a certain relationship?”
Suddenly, the group looked back at the Chinese and stayed speechless. The American official, the French and the Japanese who had spoken earlier all lowered their heads in shame(羞愧), and did not dare to answer.
In fact, the true love is not built on friendship, loyalty(忠诚) or blood relationship.
Instead, it is based on no relationship.