最佳受孕季节是
A.2~4月 B.5~7月C.7~9月 D.10~12月E.12~1月
参考答案:C
有一个直角三角形,它的斜边比一条直角边长2cm,另一条直角边长6cm,则它的斜边长为多少cm( )
A.8
B.10
C.15
D.12
Don't worry. I _____ you as soon as I finish my work. [ ]
A. help
B. will help
C. helped
D. was helping