当小车轨道放生水平高低偏差时,修理过程中如需要铲开原有轨道压板,最好使用(),以防止起重机主梁的进一步下凹。
A.气割;
B.碳弧气刨;
C.风铲;
D.电焊。
参考答案:C
Father is ill. He wants his doctor to give him _____ about his heart trouble.
A.an advice
B.some advice
C.some advices
D.advices
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