将左右两部分搭配,使其成为通顺的句子。
①Is she in the study?____ A. It's on the desk.
②Is this your bedroom?____ B. No, they aren't.
③Where's my pen?____ C. No, it isn't.
④Are they on the chair?____ D. Yes, she is.
⑤Where are my books?____ E. They are on the bed.
如图,在Rt△ABC中,∠ACB=90°,CD⊥AB,垂足为D.若AC=2,BC=1,则sin∠ACD=( )
如图是“某地水循环运动中的水量平衡示意图”.读图完成下题.
从高为5 m处以某一初速度竖直向下抛出一个小球,在与地面相碰后弹起,上升到高为2 m处被接住,则这一段过程中( )
下列各句中,没有语病的一句是( )