单项选择题 下列物质中既能在有氧，又能在无氧条件下分解供能的是( )。 A．蛋白质 B．糖 C．脂肪 D．维生素

未知题型 A．He has decided how to spend the prize money.B．He doesn't know how much his rent is going to be increased.C．He's already planned to take part in next year's essay contest.D．He has already paid his landlord for next year's rent.

未知题型 A．She's worried about the approaching snowstorm.B．She won't have time to go outside tomorrow.C．She does believe the weather report.D．She is pleased about the weather report.