What might the attitude of boys’ father be to Mrs. Cohen’s talking?
A. He might think Mrs. Cohen's words are important.
B. He might think Mrs. Cohen will waste his time.
查看答案
What does Mrs. Cohen think of the meaning of "bad parenting”?
A. She thinks that the phrase—bad parenting—is actually a support to her.
B. She thinks that they attribute the main reason of bad parenting to her.
According to Mrs. Cohen, what can she do now?
A. There is nothing she can do.
B. She can cure Brad by reading medical books.
低碳钢轴向拉伸试验的应力-应变曲线中测得的工程应力比实际应力（）
A. 大
B. 小
C. 相等
D. 无法确定
只测低碳钢强度指标，不测其弹性模量，则试验可不需要用到电子引伸计
A. 对
B. 错
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