问题
单项选择题
在检验管道的防腐层的绝缘性能是采用电火花法，正常的防腐层的检验电压是（）.
A.12KV
B.24KV
C.36KV
D.50KV
答案
参考答案：A
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在检验管道的防腐层的绝缘性能是采用电火花法，正常的防腐层的检验电压是（）.
A.12KV
B.24KV
C.36KV
D.50KV
参考答案：A
通读下面短文 ，掌握其大意, 然后在各题所给的四个选项中选出一个最佳答案。 I stood in the doorway, watching my older brother carefully putting clothes into his bag. I coughed uneasily. Finally when Rocky 1 that I was there, he turned toward me with a sad smile. “I’m 2 tomorrow,” he said. “I know.” My 3 was almost a whisper (低声). I was 4 at myself for being so weak, but I wasn’t about to cry. “My 5 is early, but there is still 6 time to come to the airport,” he said. Seeing the 7 look on my face, he quickly added, “I promise I won’t leave without saying goodbye.” I tried to say 8 , but didn’t. It is always 9 to keep quiet if you’re about to cry. “You promised you wouldn’t cry, ” he said to me, thinking that I was close to 10 . I remember the day he taught me how to ride a bike. 11 I thought he was always right behind me, holding the seat to keep me from 12 . I was happy with this, but he knew he couldn’t hold me up all my life. He told me that one day he would have to let go. His coughing stopped my thinking. What was left to say? How could I say 13 to the person who taught me everything? The next morning I 14 , looked at my alarm clock, and realized he had left 15 ago. We never even said goodbye. Goodbye, Rocky! Although he may have been many miles away, I knew he heard me, even if it was only an answer in his heart.
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