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歡迎您訪問數學考題練習:給出以下四個結論:其中正確的結論個數為(1)圓!

數學考題練習:給出以下四個結論:其中正確的結論個數為(1)圓

更新時間:2024-01-12 16:32:28作者:貝語網校

給出以下四個結論:其中正確的結論個數為

(1)圓柱體的上下兩個圓一樣大(2)圓柱、圓錐的底面都是圓

(3)圓柱是由兩個面圍成的(4)長方體的面不可能是正方形.

A.1個

B.2個

C.3個

D.4個

試題答案

B

試題解析

根據圓柱和圓錐,正方體的面的組成判斷出正確選項的個數即可.

解答:(1),(2)正確;

(3)圓柱由2個底面,1個側面共3個面圍成,故錯誤;

(4)長方體的面可能是長方形,也可能是正方形,故錯誤;

正確的有2個,

故選B.

點評:考查了幾何體的認識;掌握常見幾何體面的形狀和組成是解決本題的關鍵.

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