科学知识和技术是我们认识世界、改造世界的工具和手段。
参考答案：对
厨房产品销售信息反馈困难有何影响？
It was ________ the soldier did at the spot of the accident, not what he said, ______ moved all the citizens of the whole city.
A．that; what
B．what; that
C．that; that
D．what; which
