哲学的基本问题是（）。
A、物质和运动的关系问题
B、可知论和不可知论的关系问题
C、理论和实践的关系问题
D、思维和存在的关系问题
参考答案：D
Many suggestions ________ at yesterday’s meeting . However , neither the manager nor the engineers could ________ good solutions to the problems.
A．came up with ; come up
B．came up ; come up with
C．were come up ; come up with
D．were come up with ; come up
生活饮用水地表水源保护区分为（）
A．一级和二级保护区
B．核心区和缓冲区
C．一级和外围区
D．一类和二类
