—The American warships(军舰) have appeared near South China Sea Islands again.
—We must let the Americans know clearly that the islands ______ China.
A:come from
B:belong to
C:care about
D:believe in
10-3+1 8
wǔ rǔ
ɡān jú
qiú fàn
ɡuī ju
sā huǎnɡ
huái nán
____
下列各组物质中,一定都含有氧元素的是( )