回答下列问题:
If steel is heavier than water, why are ships able to on the sea?
IA
IIA
IIIA
IVA
VA
VIA
VIIA
O
2
①
②
3
③
④
⑤
⑥
⑦
⑧
4
⑨
⑩
下列字形和划线字注音全部正确的一项是( )