The author of the article believes that it is the test system, ______ teachers, that is responsible for the heavy burden of the middle school students nowadays.

A．other than

B．or rather

C．rather than

D．more than

自然资源的特点表现在

A．自然资源的有限性

B．自然资源的潜力的无限性

C．自然资源的系统性

D．自然资源空间分布的不均匀性

E．自然资源时间分布的均匀性