（ ）为摆脱共价键束缚的电子。

It be thought that the earth was flat.

未知题型It be thought that the earth was flat.

两种创设良好沟通氛围的技巧是 、 。

未知题型两种创设良好沟通氛围的技巧是 、 。

It’s hard to make friends if you stay home alone all th...

未知题型It’s hard to make friends if you stay home alone all the time. Get out of the house and do things that will （） , listen to the top CDs, learn about what’s new with your favorite TV or movie star.