题目

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。There is something to be said for being a generalist, even if you are a specialist. Knowing a little about a lot of things that interest you can add to the richness of a whole, well-lived life.Society pushes us to specialize, to become experts. This requires commitment to a particular occupation, branch of study or research. The drawback to being specialists is we often come to know more and more about less and less. There is a great deal of pressure to master one's field. You may pursue training, 下列实验操作中正确的是（    ） A．过滤时，可以将液体直接倒入过滤器B．为了节约火柴，可以用燃着的酒精灯点燃另一酒精灯C．为避免液体溅出，将滴管竖直伸入试管中D．检查气密性时，先将导管放入水中，再用手紧握试管