问题
单项选择题
镉柱法测定乳品中硝酸盐含量时，样品处理中（）不可以用做蛋白质沉淀剂。
A.饱和硼砂液
B.稀氨缓冲液
C.亚铁氰化钾溶液
D.乙酸锌溶液
答案
参考答案：B
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镉柱法测定乳品中硝酸盐含量时，样品处理中（）不可以用做蛋白质沉淀剂。
A.饱和硼砂液
B.稀氨缓冲液
C.亚铁氰化钾溶液
D.乙酸锌溶液
参考答案：B
| 阅读理解。 | ||
TV Programmes
| ||
| 1. If you want to know something about Japan, Which of the following programmes would be the best one? | ||
| A. Weather B. TV theatre C. Around the world D. Animal world | ||
| 2. You are a basketball fan(迷). You may watch TV at _______. | ||
| A. 19:20 on Channel 2 B. 19:40 on Channel 1 C. 20:20 on Channel 2 D. 21:15 on Channel 1 | ||
| 3. How long does the TV play "Sisters" last? | ||
| A. 30 minutes B. 50 minutes C. 90 minutes D. 120 minutes | ||
| 4. You can watch the _______ programmes if you want to learn English on TV. | ||
| A. English news B. English classroom C. English for today D. All the above | ||
| 5. If you are fond of (爱好) music, you can turn on the TV at the following time except (除…以外) _______. | ||
| A. 21:15 on Channel 1 B. 19:25 on Channel 2 C. 22:05 on Channel 2 D. 20:10 on Channel 1 |