保险是金融体系的重要组成部分,保险在经济生活中的基本功能是( )
A:获得投资回报
B:规避风险,补偿损失
C:为经济建设积累资金
D:提供防灾防祸的预防性服务
4089≈____
6901≈____
下列关于人脑的叙述,正确的是( )
—Did you have a good time?
—It couldn't be worse. We were held up on the expressway for three hours. On the way back, we found the car got a f____ tyre, and the spare was, too.