( )是指建筑安装工程中的对卫生、安全、环境保护和对公众利益起决定性作用的项目。

A．一般项目

B．主控项目

C．保证项目

D．基本项目

Russia's withdrawal of its experts from China did not strangle (压垮) the Chinese people; _____ it stirred up their enthusiasm for greater exertions.

A．on the other hand

B．on the contrary

C．to the contrary

D．in consequence