问题
单项选择题
对于黑色金属表面层内的缺陷，其简易的探测方法是（）。
A.磁粉探伤
B.着色探伤
C.荧光探伤
答案
参考答案：A
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对于黑色金属表面层内的缺陷，其简易的探测方法是（）。
A.磁粉探伤
B.着色探伤
C.荧光探伤
参考答案：A
Jennifer was sitting on the beach. After all she had been through, it was just what she needed. It’s getting __31 ,” she thought. “I should go home.” She wanted to know how her __32 would react（反应）, when she __33 home after the three days she was missing（失踪）. It was really dark when she finally reached her front door. It seemed different to her. _34_ had taken care of the outside garden for __35 days. She was surprised as her father usually worked hard to keep everything __36 and tidy（整洁的）. She couldn’t understand what was going on. She entered the _37 _. First, she went into the kitchen where she saw a note written __38 her father. __39 said, “Dear Ellen, here is some coffee. I am out searching(搜寻).” Ellen was her mother, but where was she? She went to her parents’ room. She found her there. Her __40 was lying on the bed, fast sleep. Her face looked so _ 41 , as if she hadn’t slept for days. Jennifer wanted to wake her up __42 she looked too tired. So Jennifer just fell asleep beside her. When Jennifer _43_, something was different: she wasn’t in her mother’s room any more and she wasn’t wearing the old clothes she ran away _ 44 . She was on her own bed. It felt so good being back home. Suddenly she heard a voice ask, “Are you feeling better now, dear? You know you __45 us all very, very worried.”
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