化学实验中，人的五官起着非常重要的作用，下 * * 官的使用符合实验要求的是（ ）
A．
鼻子闻
B．
嘴巴吹
C．
耳朵听
D．
眼睛看
A、直接把鼻孔凑到试剂瓶口闻气味的操作是不正确的，因此答案A不正确；
B答案中该同学直接吹灭酒精灯是错误的，应该用灯帽盖灭，因此答案B不正确；
C、氢气纯度的检验中主要是听声音因此C答案正确；
D答案中眼在仰视刻度，因此，D答案不正确．
故选C．
Questions 16-22
· Read the article below about a new product.
· Are sentences 16-22 “Right” or “Wrong” If there is not enough information to answer “Right” or “Wrong”, choose “Doesn’t say”.
· For each sentence (16-22), mark one letter (A, B or C) on your Answer Sheet.
| NEW PRODUCT WILL SAVE LIVES Drinking water that looks clean may still contain bugs, which can cause illness. A small company called Genera Technologies has produced a testing method in three stages, which shows whether water is safe. The new test shows if water needs chemicals added to it to destroy anything harmful. It was invented by scientist Dr Adrian Parton, who started Genera Technology five years ago. He and his employees have developed the test together with a British water company. Andy Headland, Genera’s marketing director, recently presented the test at a conference in the USA and forecasts good American sales for it. Genera has already sold 11 of its tests at ￡42,500 a time in the UK and has a further four on order. It expects to sell another 25 tests before the end of March. The company says it is the only test in the UK to be approved by the government. Genera was formed five years ago and until October last year had only five employees; it now employs 14. Mr Headland believes the company should make around ￡ 1.9 million by the end of the year in the UK alone. |
Genera Technologies produces a product which cleans dirty water.
A．
| A. Right |
B．
| B. Wrong |
C．
| C. Doesn’t say |