若一个三角形的两边长是9和4且周长是偶数,则第三边长可能是[ ]
A.5
B.7
C.8
D.13
答案:B
The most energetic and important festivals are the ones that ____ the end of winter and to the
coming of spring. [ ]
A. look at
B. look through
C. look after
D. look forward to
预防肥胖症应该从何年龄组抓起?