作为高档耐用品的汽车已经进入寻常百姓家，其需求量（Q）受汽车价格（P）、居民收入（M）等因素影响。不考虑其他因素，图中能正确反映P与Q、M与Q关系的图形有（   ）   

   I am Bill Jones. I am a teacher of English. My wife is Linda Jones. She is a nurse. We have a daughter and a son. We have many friends.
Look! These are my friends. This is Mr. Black. He is a worker. He works in a shoe factory He makes shoes there. That’s Mrs. Black. She is a worker on a farm near here. The girl is their daughter. She is a student. She is thirteen. The boy is their son. He is a young soldier（战士）. His name is Carl Black.

如图所示，某同学用弹簧测力计拉着放在水平桌面上的木块匀速滑动，在木块前端离开桌面至一半移出桌面的过程中，弹簧测力计的示数____、木块对桌面的压力____，木块对桌面的压强____。（均选填“变大”、“变小”或“不变”）

在﹣2，π，15，0，﹣ $\frac{2}{3}$ ，0.555…六个数中，整数的个数为（   ）