小明想测量柑橘的密度是多少，他用天平测出一个柑橘的质量是114g，测得装满水的溢水杯的总质量是360g；然后借助牙签使这个柑橘浸没在溢水杯中，当溢水杯停止排水后再取出柑橘，接着测得溢水杯的总质量是240g．则这个柑橘的密度是____kg/m³，小明用这种方法测出的这个柑橘的密度与它的实际密度比较____（填“偏大”或“偏小”）．

    It seems to be strange to you there is a blind spot(点) on the eyes. Here is an interesting experiment 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, L on 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'll 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 of the letter falls on the blind spot, it won't be seen. That is why either of the letters disappears.

世界上流经国家最多的一条国际河流是(      )

  

计算．

(9153－2319)÷67=____