A:secure
B:fu
C:popular
D:threatened
下列骨骼肌附着骨的模式图中正确的是( )
①∠AGD=112.5°;②tan∠AED= 2 +1;③四边形AEFG是菱形;④S△ACD= 3 S△OCD.
其中正确结论的序号是____.(把所有正确结论的序号都填在横线上)
It there anyone in your class ______ family is in the country?