下列物质中属于非电解质的是 A．BaSO4 B．NaOH C．Na2O2 D．N_爱下问搜题

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问题选择题

下列物质中属于非电解质的是

A．BaSO₄

B．NaOH

C．Na₂O₂

D．NH₃

答案

答案：D

题目分析：A．BaSO₄是盐，属于电解；B．NaOH是碱，属于电解质； C．Na₂O₂是盐，属于电解质；选D。

填空题

选择恰当的单词并用其适当形式填空补全短文。

clean, drive, can, tired, excite, buy, have, be, do, borrow

     Peter held a party on his birthday in his house. Although he  1   a great time, it made him very   2   .
Before the party, he did many things. First, he    3   some money from his parents    4   some food and
drinks.  Next he had to    5   the living room.  Then he    6   his father scar to pick up some of his friendss.  When the    7   party was over, he found there,     8     still lots of things to do. He   9   the dishes,
swept the floor, and took out the trash. When he    10   have a test, it was over twelve o'clock.

判断题

地衣是藻类和细菌共生的复合体。