The problem referred to at the class meeting, if ______________ in time, will make a bad effect on everyone in our class.

A．not dealt with

B．not to deal with

C．not being dealt with

D．not dealing with

从人造卫星、飞机或其他飞行器上收集地物目标的电磁辐射信息，以判认地球环境和资源的技术称之为什么？