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【单选题】
用钠离子玻璃电极测定钠离子时，采用调节缓冲液的作用是（）。A.
消除液接电位影响
B.
调节温度
C.
提高灵敏度
D.
控制溶液pH值
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举一反三
【简答题】对某边进行往返观测，得观测值分别为87.213m和87.226m，则观测结果为 m。
【单选题】The most important way to reduce pollution is .
A.
for all industries to stop production
B.
for us to stop using automobiles
C.
for the farmers to stop using fertilizers and festicides
D.
for the government and businesses to take action toward reducing pollution
【单选题】Now more and more people walk or ride bikes instead of taking the taxi to reduce pollution. [ ]
A.
air
B.
soil
C.
water
D.
noise
【简答题】阅读理解 China's government has been trying all measures to reduce pollution in the past few years. Now people can enjoy a fresh environment everywhere. The following two graphs are adopted from the colum...
【单选题】We are confident that the environment ________ by our further efforts to reduce pollution.
A.
improves
B.
will be improved
C.
has improved
D.
was improved
【简答题】We have been trying all measures to reduce pollution in the past few years. Now people can enjoy a fresh environment everywhere. The following two graphs are adopted from the column of “City Informat...
【简答题】Ch ina’s government has been trying all measures to reduce pollution in the past few years. Now people can enjoy a fresh environment everywhere. The following two graphs are adopted from the column of...
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