A.6~7個(gè)月 B.7~8個(gè)月 C.9~12個(gè)月 D.12~13個(gè)月 E.18個(gè)月以后
A.3~4 B.4~5 C.5~6 D.7~8 E.8~9
A.鄰角邊的長(zhǎng)度 B.對(duì)邊中點(diǎn)的連線長(zhǎng)度 C.對(duì)邊中點(diǎn)連線的1/2長(zhǎng)度 D.對(duì)角連線的長(zhǎng)度 E.菱形四邊的周圍長(zhǎng)度