题目内容

--- Don't worry. My mother will look after your baby .--- Thanks a lot.

A. careful enough
B. enough careful
C. carefully enough
D. enough carefully

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I can't ____give an answer to your question.

A. easy
B. easily
C. hard
D. hardly

The two hens ______eggs in the same place yesterday.

A. lay
B. laid
C. lied
D. layed

请完成教学视频中的黑金风格海报的制作，存储为JPEG格式上传至答案区。

对于等截面梁，通过梁的图可确定危险截面的位置，计算其上危险点的最大正应力。