You must keep _______ from the dog.
A:in
B:away
C:up
D:with
加入抗凝剂的血液离心后出现分层现象,正确的分层顺序(由上向下)是( )
读如图,完成问题. 关于香港和澳门地理特征叙述错误的是( )
( 1 )____ A. cute B. uncle C. computer
( 2 )____ A. blue B. fun C. umbrella
( 3 )____ A. leg B. me C. eat
( 4 )____ A. sun B. unit C. but
—Yes.
(3+2)×20 (32+56)×9 (57+23)×12
3×20+2×20 32×9+56×9 57×12+23×12