请教２００２－５－３０

rabbit_little

２００２－５－３０

Although all sedimentary rocks contain iron, but the deposits that are richest in

iron consist predominantly of minerals such as iron ocides, arbonates, silicates and

sulfides.

我知道正确答案是Ｂ，although与but不可连用，可是Ｃ选项呢？are richest,为什么不是are the richest 呢？最高级不是要加the 修饰吗？

flowersforzoe

be rich in

pamela111

最高级做表语时the可加也可不加，但做前置定语是一定要加the的，如 the best student.

rabbit_little

谢谢解答！