正确答案: B
现场调查法
题目:环境现状调查的方法中,( )可以针对使用者的需要,直接获得第一手的数据和资料,以弥补收集资料法的不足。这种方法工作量大,需占用较多的人力、物力和时间,有时还可能受季节、仪器设备条件的限制。
解析:B
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学习资料的答案和解析:
[单选题]在氢氧化钡溶液中主要存在的微粒有
氢氧根离子
[单选题]9. You must try ________ the work tomorrow.
to finish
[单选题]( )5. —How do the students send their homework to their teachers?—___________.
By fax
[单选题]8.Jenny won the first prize in the piano competition. She was so excited that she ______all night.
stayed up
解析:8.A【解析】句意为:“Jenny在钢琴比赛中获得第一名,她兴奋地整夜睡不着。”故答案为A。