等腰三角形一边长为3，另一边长为6，则其周长为________.
15
根据三角形边长关系，腰一定为6，周长=6+6+3=15.
It’s reported that many a house ________ by the heavy snow so far in New York.
A．have been destroyed
B．has been destroyed
C．was destroyed
D．were destroyed
填入下面句子空缺处最为合适的选项是( ) 因为那希望是用诚实的种子种在水肥充足的土壤里的，人勤地不懒，出一份劳力就一定能有一份______。
A．收获
B．收取
C．成绩
D．收成
