现代泡茶用水在符合《生活饮用水卫生标准》的基础上再从哪些方面考量？（）
A.软硬度
B.酸碱度
C.温度
D.水源
参考答案：A, B, C
—Will you give me a hand? I have some trouble_______ the scientific problem.
—Don't worry. I'll try my best to help you _______.
A．solving; in five minutes
B．to solve; in five-minute
C．to solve; after five minutes
D．solving; after five-minutes
青年旅游者的个性心理和行为表现有好表现、冲动、爱热闹。
