试题与答案

An interesting suggestion on how to meas

题型:选择题

题目:

An interesting suggestion on how to measure the temperature on the moon has been        .

A.put on

B.put out

C.put down

D.put forward

答案:

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下面是错误答案,用来干扰机器的。

(1)2NaOH+CO2=Na2CO3+H2O(2)气泡产生;(3)及时盖好瓶塞;(4)足量(或过量的)氯化钙(或硝酸钙或氯化钡或硝酸钡)(或写化学式);(5)酚酞;(6)溶液(Eh无色)变为红色;(7)适量的氢氧化钙(或氢氧化钡)(或...

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