① ____ A. Sunday B. weekend C. Monday D. Tuesday
② ____ A. older B. teacher C. funnier D. thinner
③ ____ A. visited B. watched C. cooked D. excited
④ ____ A. nose B. leg C. head D. toothache
⑤____ A. twelve B. fifth C. third D. first
下列变化过程中只发生物理变化的是( )
画△表示乘法算式: 2×4____。
某几何体的三视图如图所示,图中的四边形都是边长为1的正方形,两条虚线互相垂直,则该几何体的体积是( )