各部门、基层队现场动火作业，需要部门主管、基层队长同意即可，可以动火结束后，再到安委办补办手续。
参考答案：错
The big retailers are starting to think small, too. Sainsbury's and Tesco have launched convenience-store chains, called Local and Express, respectively—that have fast become ______ in British towns.
A．ubiquitous
B．established
C．frequented
D．known
试述母岩风化过程中元素的转移顺序及母岩风化的阶段性。
