粉末静电喷涂依靠的静电吸附原理，其中涂面作为（）_爱下问搜题

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问题填空题

粉末静电喷涂依靠的静电吸附原理，其中涂面作为（）

答案

参考答案：正极

完形填空

Have you ever planted a few trees on Tree Planting Day? Each year, millions of people, both 41.______, plant a lot of trees. But this may not be the best way to make your home a 42._____ place.
Last week we visited a park in Hebei. We were 43._____ to find most of the trees had been burned. The workers told us that the trees 44._____ soon after they were planted because they weren’t watered well enough. 45._____ workers burned them and cleaned the place for 46._____ trees to be planted this year. 47.______ a card found in one of the dead trees, a student wrote,” I hope this tree will grow up with me to 48.______ the backbone (栋梁) of our country.” The workers said that the survival (存活) of the trees was really more important than 49.______ trees were planted.
Some people in Beijing now have a new idea that they can donate (捐赠) some money and let professional (专业人士) plant and 50.______ the trees.

A．students and teachers	B．old and young
C．boys and girls	D．mother and father

C．interesting

D．take care of

判断题

水的总矿化度即水中各种离子、分子和化合物的总量。