【名词&注释】
仪器设备(instrument and equipment)、使用者(user)、氢氧化钡(barium hydroxide)、氢氧根离子(hydroxide ion)、第一手(first-hand)
[单选题]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(first-hand)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。
A. 收集资料法
B. 现场调查法
C. 遥感方法
D. 市场价值法
查看答案&解析查看所有试题
学习资料:
[单选题]在氢氧化钡溶液中主要存在的微粒有
A. 氢氧化钡分子
B. 氢氧根离子
C. 钡原子
D. 氧离子
[单选题]9. You must try ________ the work tomorrow.
A. finish
B. to finish
C. finishing
D. finishes
[单选题]( )5. —How do the students send their homework to their teachers?—___________.
A. By fax
B. By faxes
C. By the fax
D. By a fax
[单选题]8.Jenny won the first prize in the piano competition. She was so excited that she ______all night.
A. stayed up
B. showed up
C. made up
D. got up
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