A:①②③④
B:①②③
C:②③④
D:①②④
下列关于质点的说法中正确的是( )
⒈____ A. Ff B. Mm C. Yy D. Xx
⒉____ A. name B. thank C. am D. that
⒊____ A. teacher B. great C. please D. eat
⒋____ A. person B. teacher C. father D. sister
⒌____ A. mother B. brother C. father D. thank
妖娆____
忧yù____
莽莽____
笙____箫
骤____然
chà ____开
青荇____
风sāo____