——He always appears to _________. ——That's because he's really knowledgeable and experienced.
A:make an effort
B:have a point
C:pull together
D:take place
十一月四日风雨大作
陆游
僵卧孤村不自哀,尚思为国戍轮台。
夜阑卧听风吹雨,铁马冰河入梦来。
苔藓植物吸收水分和无机盐的结构是它的根.
分式 12x,12y2,-15xy的最简公分母为 ____ .
下列各式计算正确的是( )