题目内容

δ5是表示钢筋拉伸至变形达5%时的伸长率。

A. 对
B. 错

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钢材中含磷影响钢材的热脆性，含硫影响钢材的冷脆性。

A. 对
B. 错

钢材的冲击韧性值越大，表示钢材抵抗冲击荷载的能力越强。

A. 对
B. 错

1.After being rescued from the earthquake, the people agreed that they had a lot _______ .

A. to thank
B. to be thanked
C. to be thankful
D. to be thankful for

The speaker, ____ for his legendary (传奇的) experience, waswarmly received by the audience.C. being knownD. known

A. having known
B. knowing
C. being known
D. known