题目

如图所示为潜望镜工作原理图。若现有一军舰位于S点处，则潜水艇中的人通过潜望镜看到军舰的像在下图中的______点处。 答案：S3  Gu Tianle, a famous actor, has donated much money to build over 100 schools. He ________ food, clothes, books and many other things for the children in poor areas.A.feedsB.providesC.protectsD.gives