The scholarly interest in perception systems largely from questions about the sources and validity of what \_\_\_\_.
Ait is known as human knowledge
Bis known as human knowledge正確答案
Cknown human knowledge
Dis human knowledge known
答案與詳解
what 作為名詞子句的主詞,後接被動語態的直述句語序 is known as,語法完全正確,意為「被稱為人類知識的事物」。
