some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下

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someoftheexperiments___inthebookareeasytoperformAtobedescribedBdescribedCtodescribeDdescribing选哪个逐项分

some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下
some of the experiments___in the book are easy to perform
A to be described B described C to describeD describing选哪个 逐项分析一下

some of the experiments___in the book are easy to performA to be described B described C to describeD describing选哪个 逐项分析一下
书中描述的一些实验很容易表演.这应该是一个过去分词做定语的形式,实验在书中应该是“被描述”用过去分词表示被动的含义,所以应该选B项