Beethoven is a very____ (著名的)musician .I'm____ (紧张的)out because I can't find the way home.My mother often____ (担心)about my father's health..She likes to s____ e-mails at school.Lily is very t____ , she'd like to have some water.
标志宋金对峙局面形成的是( )
有一个密度均匀的长方体铜块,被截成A、B两块,如图所示,已知LA:LB=3:2,则它们对水平桌面的压力和压强之比分别为( )
1218 ____ 2565 ____