制备时应缓缓升温加热熔化至2/3时，停止加热，让余热使其全部熔化（） A.聚乙二醇

患者，男，26岁，夜晚当风睡觉，晨起右侧面神经麻痹，口眼歪斜，宜首选（）。

A.全蝎、僵蚕

B.牛黄、羚羊角

C.天麻、钩藤

D.石决明、代赭石

E.龙骨、牡蛎

10岁男孩，发热、寒战、咳嗽5d，诊断为"支气管肺炎"，经氨苄青霉素治疗，病情无好转并逐渐加重，下列病原体除哪一项外均可引起上述症状（）

A.肺炎支原体

B.嗜肺军团菌

C.流感病毒

D.衣原体

E.结核菌

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that overconsumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.
The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.
Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue, encouraging customers to reuse their plastic bags, for example.
But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But it is also applied to a wide range of consumer products, which often have far more packaging than necessary.
There are signs of hope. As more Of us recycle, we are beginning to realize just how much unnecessary materials are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.

What can be inferred from Paragraph 4

A. Unpackaged products are of bad quality.
B. Supermarkets care more about packaging.
C. It is improper to judge quality by packaging,
D. Other products are better packaged than food.

水在下述色谱中，洗脱能力最弱（作为底剂）的是（）。

A、正相色谱法

B、反相色谱法

C、吸附色谱法

D、空间排斥色谱法

由于产地的不同白毫银针分为南北两路：“南路”银针产于福建福鼎；“北路”银针产于福建政和。( )