阅读《河中石兽》,完成下列各题。(9分) 沧州南,一寺临河干,

阅读《河中石兽》,完成下列各题。(9分)

沧州南,一寺临河干,山门圮于河,二石兽并沉焉。阅十余岁,僧募金重修,求石兽于水中,竟不可得。以为顺流下矣,棹数小舟,曳铁钯,寻十余里,无迹。

一讲学家设帐寺中,闻之笑曰:“尔辈不能究物理,是非木杮,岂能为暴涨携之去?乃石性坚重,沙性松浮,湮于沙上,渐沉渐深耳。沿河求之,不亦颠乎?”众服为确论。

一老河兵闻之,又笑曰:“凡河中失石,当求之于上流。盖石性坚重,沙性松浮,水不能冲石,其反激之力,必于石下迎水处啮沙为坎穴,渐激渐深,至石之半,石必倒掷坎穴中。如是再啮,石又再转,转转不已,遂反溯流逆上矣。求之下流,固颠;求之地中,不更颠乎?”如其言,果得于数里外。

然则天下之事,但知其一,不知其二者多矣,可据理臆断欤?

18、解释下列句中加点词的含义。(4分)

①山门于河    沙为坎穴    ③转转不    知其一

19、给下面句子划一处停顿。(2分)

    是 非 木 杮

20、有人说,纪昀这篇文章也是臆断之作,老河兵的说法难以立住脚,你知道它的问题在何处吗?(3分)

答案

18、①倒塌。  ②冲刷。  ③停止。④只。每小题1分。

19、是 / 非 木 杮。2分。

20、水流“啮沙为坎穴,至石之半,石必倒掷坎穴中”,石兽向上游前进一步的同时,其水平位置也必然下沉一步;“如是再啮,石又再转”,十几年后向上游前进了十几里,那它的水平位置也可以下沉十几里吗?意思对即可。 3分。

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