挑战习题
1/4单选题
难度:

1.

在△ABC中,已知角A,B,C所对的边分别为a,b,c,且a=3,c=8,B=60°,则△ABC的周长是(  )


A

17

B

19

C

16

D

18

提示1:
PHA+6aKY55uu5Lit5ZGK6K+J5oiR5Lus6L65YSzovrljLOinkkLvvIzlj6/nlLHkvZnlvKblrprnkIbmsYLovrliLjxicj48L3A+
正确答案:RA==
PHA+6Kej77ya4oi1YT0z77yMYz0577yMQj02MMKw77yMPGJyPjwvcD48cD7iiLTnlLHkvZnlvKblrprnkIZiPHN1cD4yPC9zdXA+PWE8c3VwPjI8L3N1cD4rYzxzdXA+Mjwvc3VwPu+5ozJhY2Nvc0LvvIzljbPvvJpiPHN1cD4yPC9zdXA+PTkrNjTvuaMyNO+8jOWNs2I9N++8jDxicj48L3A+PHA+5YiZYStiK2M9MTg8L3A+PHA+5pWF6YCJ77yaRO+8jjxicj48L3A+