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朗读第4课本文的第5段（p69.中间段落27-41行），并录音上传。

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截面对其形心轴的惯性矩总是小于形心外与该轴平行的轴的惯性矩。（）

A. 对
B. 错

1.1 Fill in the blanks with words or phrases from the word list below. Change the form where necessary.replaceconflicthighlightenvironmentsubsequentabundantratesourcereliabledistributeforeseecivilizationintensifycomplicatedbudgetinnovationmostlyoutcomeon the point ofbe confronted within the interest ofring in one's earsIt will be a close game (势均力敌的比赛). The __________ is hard to predict.

replaceconflicthighlightenvironmentsubsequentabundantratesourcereliabledistributeforeseecivilizationintensifycomplicatedbudgetinnovationmostlyoutcomeon the point ofbe confronted within the interest ofring in one's earsTravelers on a tight ____________ would choose to go there by train instead of by plane.

replaceconflicthighlightenvironmentsubsequentabundantratesourcereliabledistributeforeseecivilizationintensifycomplicatedbudgetinnovationmostlyoutcomeon the point ofbe confronted within the interest ofring in one's earsTom was_____________ leaving the garden when he heard someone cry: "Isn't it Tom? I can hardly believe my eyes."