单选题 Juncao technology mainly applies kinds of straw plants as ______ in place of timber.

单选题 When a failure occurs within a given node, a ______ is carried out to handle that.

单选题 Societies need to develop highly ______ behaviors for survival.

单选题 The relationship between human and nature are the ______ ideology in ecological civilization.

单选题 Demographic ______ of modern civilization needs alternative solutions.

单选题 India is largely absent from those supply chains in East and Southeast Asia that have come to ______ globalization itself.

单选题 Long before the use of machinery and fertilizers, ______ and creative farmers had already used different kinds of methods to increase crop yields.

单选题 The aborigines belong to many different, and often ______, clans and tribes, with no common language or religion.