A：put out
B：work out
C：take out
D：get out
顺次连接矩形四边中点所得的四边形一定是（）
①测电阻前要使红、黑表笔相接，调节调零电阻，使表头指示电流为零；
②红表笔与表内电池正极相连，黑表笔与表内电池负极相连；
③红表笔与表内电池负极相连，黑表笔与表内电池正极相连；
④测电阻时，表针偏转角度越大，待测电阻阻值越大；
⑤测电阻时，表针偏转角度越大，待测电阻阻值越小．
Little Water Drop lives in the sea. It is raining. He wants to be ____
in the sky. The sun ____and he gets hot. Then he goes up to the sky. Now he is in a cloud. He flies ____rivers and mountains. He sees some thirsty ____. They need water. He falls down to the ____. A tree drinks him. Now he is inside the tree.
