肾冠状切面上肉眼可见到哪些结构？

It seems to be strange to you there is a blind spot(盲点)on the eyes,  Here is an interesting experiment(实验)that can make something disappear, when one eye is open.

Make a card about the size of a postcard and write two English letters L and R on it, Lon the left and R on the right. First, hold the card about 80 cm away and you see both the letters.  Then close your right eye and look at the letter R only with your left eye. And now, as you move the card slowly towards you, you' 11 find the letter L disappearing. But if you move the card nearer to your face, the letter will be seen again. Now do the same experiment with your left eye closed, you'll find the letter R disappearing.

Why does the letter disappear? It is because there is a blind spot on the eye. When the image（影像）of the letter falls on the blind spot,  it won't be seen.  That is why either of the letters disappears．

小题1:The writer of the passage thinks that_______ there is a blind spot on the eye.

A．few people know

B．no one knows

C．only you know

D．all the people know小题2:The word "disappear" in the passage means_______ in Chinese.

A．驱散

B．消散

C．消失

D．遗失小题3:You fail to see the letter L in the experiment because _______.

A．your eyes are poor

B．its image falls on the blind spot

C．your left eye is not open

D．you move it close to your eye小题4:In which order(顺序)should you do the experiment?

①Hold the card ②Move the card nearer ③Close your right eye

④write two English letters ⑤Look at the letter R ⑥Make a card

A．④⑥①②③⑤

B．①③⑥④⑤②

C．⑥①④③②⑤

D．⑥④①③⑤②小题5:The passage mainly tells us_______.

A．how to find the blind spot

B．an interesting experiment

C．where the blind spot is

D．there is a blind spot on the eyes.

小儿纯阳应理解为（）

A.有阳无阴

B.阳亢阴亏

C.阳常有余

D.生机蓬勃，发育迅速

E.脏腑娇嫩

希腊哲学家（）则把人的记忆比喻成鸟舍。

1995—2009年，该地区城镇失业人员登记就业人数与年末尚有登记失业人数相比增速（）。

A．较高

B．较低

C．相当

D．不好比较