下图所示是木炭在氧气中燃烧的实验操作，试完成下列问题：

（1 ）A 图中，夹持木炭的工具是__________ ；燃烧停止后，取出余炭，往集气瓶里加入少量的澄清石灰水，振荡，发生的现象是____________________ 。

（2 ）B 图中，取一小块木炭放在火焰的__________ 部分迅速烧红；C 图中盛放氧气的瓶口盖上玻璃片的目的是____________________ 。

A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with （1）, and that it has a mechanism for（2） graphical files. Display text, display graphics, and （3） hyperlinks--there’s 99 percent of the （4） value. That’s not to say that the manufacturers didn’t go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can’t wait to delete from your favorites of bookmarks menu Remember when client-side Java applets were supposed to become the preferred（5）for application development Remember frames and all their nasty side effects

（5）是（）

A.plane

B.plant

C.plate

D.platform