Chu Kochen utilized the principle of to reconstruct past temperature changes in China in the last five thousand years. It is now well known as Chu Kochen’s Curve. A: climatology B: comprehensive physical geography C: geomorphology D: phenology

Heute ______ ich nicht kommen. Ich _______ das Abendessen kochen. A: kann, muss B: kann, darf C: soll, muss D: soll, darf

下列单词中，字母ch组合读音与其它不一样的是： A: ach B: euch C: kochen D: Bauch

"Why didn't the scientific and industrial revolution take place in modern China?" is called "The Grand Question". A: Needham's B: Descartes' C: Libniz' D: Kochen Chu's