Lucy is a(n) ______ girl and she doesn't like talking much.
A:outgoing
B:athletic
C:quiet
D:wild
0.6:x=1.5:0.4
则x=____
(用小数表示)
括号里最大能填几?
40×____<281
600×____<4600
____×700<2830
____×30< 920
下列有关生物多样性及保护的说法,正确的是( )