文明收费站标准中要求收费站内无治安隐患，符合“四防”标准，请问“四防”的具体内容是什么？
参考答案：
防火、防盗、防灾害事故、防人为破坏。
More buildings _______ in this city in 2010. [ ]
A. will build
B. will be built
C. has built
D. was built
价格标准
