Scientists are always studying the ______ of nature. A: phenomenons B: phenomenon C: phenomenas D: phenomena

One of the ________ that ______ my attention was magnetism. A: phenomenon;drew B: phenomena;attracted C: phenomenons;paid D: phenomenon;paid

One of the _____B___ that ______ my attention was magnetism. A: phenomenon;drew B: phenomena;attracted C: phenomenons;paid D: phenomenon;paid

Which of the following statements is consistent with the development of economic geography before the 20th century? A: It was mainly recorded in historical accounts B: It didn't form systematic scientific theories C: It focused on observations and descriptions about phenomenons D: It formed a relatively complete theoretical system.