问题
单项选择题
建设项目环境保护验收时，电磁辐射的监测频次为在各种电磁辐射源的正常工作时段，每个监测点位监测( )次。
A．1
B．2
C．3
D．4
答案
参考答案：A
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建设项目环境保护验收时，电磁辐射的监测频次为在各种电磁辐射源的正常工作时段，每个监测点位监测( )次。
A．1
B．2
C．3
D．4
参考答案：A
An old friend from abroad（国外）__16__ I wanted to stay with telephoned me from the airport to tell me that he had arrived. I was still in the __17__, but I had done something to get ready for his coming. After explaining where my new room was, I told him __18__ I had left the key under the doormat（门垫）. __19__ I would be home rather __20_, I asked him to go into the kitchen and __21__ himself to some food and drink. Two hours later, my friend telephoned me from the __22__. At the moment, he said __23__ was __24__ the radio __25__ having a truly wonderful meal. He had cooked two eggs and helped himself __26__ some __27__ chicken from the refrigerator. Now, he said, he was drinking a glass of milk __28__ he hoped I would __29__ him. When I asked him if he had __30__ the room without __31__, he answered that he had __32_ been able to find the key under the doormat. As the living-room window just __33__ the apple tree had been left _34__, he had climbed in. I listened to all this in __35__. There in no apple tree in front of my living-room. There is one in front of my neighbor’s.
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