This is Li Ming. is a boy.[ ]
A. She
B. His
C. He
答案：C
Where does a live? In a tree. [ ]
A. panda
B. snake
C. bird
若一个三角形三个内角度数的比为2：7：4，那么这个三角形是 [ ]
A．直角三角形
B．锐角三角形
C．钝角三角形
D．等边三角形
