用气相色谱仪分析样品时,当载气漏气时,会出现()。
A、气体稳压稳流不好;
B、气路产生的“鬼峰”;
C、峰的丢失;
D、峰数增加
参考答案:A, B, C
根据提示,完成(1)-(2)小题。(4分)
如果生命是一瓮酒,我们爱的不是那百分之几的酒精成分,而是那A若隐yǐng 若见的芬芳。如果生命是花,我们爱的不是那B五彩班斓nán,而是那和风丽日的深情的舒放。如果生命是月球,我们爱的不是那些冷硬的岩石,而是在静夜里那正缓缓流下来的如水月色,C纤尘不染rǎn。
(1)语段中ABC三处加点的词浯,注音与书写都正确的一项是:( )(2分)(2)仿照划线部分的句子,写一句你对生命的感悟。(注意加粗的词语)(2分)
Can you believe it There’s a world paper shortage. There’s a national bottle shortage, and we’re running out of raw materials like timber and tin -- or so the papers say. Well, I’ve just emptied my shopping basket after my weekly shopping trip and it was full of things made from these scarce materials. Half of what I’d bought I threw away at once; all those unnecessary paper bags, plastic bags, fresh wrapping paper and old newspapers they put the food in nowadays. Modern packaging makes shopping cleaner and more convenient, but at what cost Every time you throw away a paper bag you’re throwing away part of a tree -- and trees don’t grow overnight! At this rate there soon won’t be any trees left, and then what shall we do Perhaps we’ll learn to do what my mother did. She used to keep a store of paper bags in a kitchen drawer and use them again and again for her shopping. Most goods were sold loose in those days. And the shopkeeper weighed out the amount you wanted. Of course, liquid goods have always been sold in bottles or cans, but why can’t we use these containers more than once If we re-use all our bottles we would save on the raw materials and energy needed to make new ones. At the moment 90% of our rubbish is just dumped. It’s time we started to think seriously about the growing shortage of raw materials in the world today.
What does the author want us to do [A] He asks for an awareness of the shortage of raw materials. [B] He wants us to use paper bags again and again. [C] He wants us to buy liquid goods. [D] He wants us to re-use all our bottles.