下列所给的用电器中用到电动机的电器是（  ）

用括号内所给词的适当形式填空
⑴I enjoy reading this kind of ____  magazine. （每周）
⑵It is good for your health to ____  deeply. （呼吸）
⑶It ____  on the two sides of the river.（位于）
⑷A large number of new ____ will live in Yangzhou.（移居者）
⑸The small town is becoming more and more ____  and polluted.（拥挤的）
⑹His mother has devoted____ to the teaching of Home Economics.（she）
⑺The making paper was a Chinese____ . （invent）
⑻It is well ____  that Yangzhou is one of the most beautiful cities in our country.（know）
⑼He had been deeply affected by the____  death of his father. （suddenly）
⑽There will be ____  no rain tomorrow.（probable）

从水体中取得一定水样，首先测定其初始溶氧量．然后将水样灌入两个相同的瓶子中，一个白瓶完全透光，另一个黑瓶完全不透光，然后放回原来水层．24小时后取出，分别测量白瓶和黑瓶中的溶氧量．下列相关叙述错误的是（　　）