持有、使用、生产、储存、运输和处置核材料的单位，应当依法取得核材料许可证。
By WWII, scientists had already begun looking at alternative gelling substances for routine use in bacteriology, but concluded that agar was still better as it is both firmer and easier to handle. Today, some specialized microbiology applications use the colloid carrageenan (extracted from red seaweed Chondrus crispus, or “Irish Moss”), a more transparent and less auto-fluorescent alternative to agar (agar emits its own background fluorescence when excited by light). However, for routine bacteriological use, carrageenan is more difficult to dissolve, requires higher concentrations, can degrade at high temperatures, and forms weaker gels, which may result in puncturing its surface during the plating of cells.
，更多细节参见WPS官方版本下载
居民会议由居民委员会召集。有十分之一以上的年满十八周岁居民、户的代表或者三分之一以上的居民代表提议，应当召集居民会议。召集居民会议，应当提前十日通知居民；遇有特殊情况的，可以临时通知居民。
This is not the first time a Labour government has tried to set a target for immediate access. In 2000, a 48-hour target was set, but by the 2005 election campaign it was causing controversy, with patients complaining that they could not book an appointment in advance because so many were being held back for quick bookings.