【简答题】旅游活动的发展,大体经历了三个发展阶段,即古代旅游阶段、近代旅游阶段和_______。
【单选题】I hereby declare that my vessel has a ()15 400 metric tons.
【单选题】If the IMF members' borrowing needs are larger than its forward commitment capacity, the IMF will ______.
A.
call for new quotas from its members
B.
call for New Arrangements to Borrow
C.
sell gold to finance excessive needs
【单选题】细菌经紫外线照射会发生DNA损伤,为修复这种损伤,细菌合成DNA修复酶的基因表达增强,这种现象称为
【判断题】( )旅游活动的发展大体经历了三个发展阶段,即古代旅游阶段、近代旅游阶段和现代旅游阶段。
【单选题】Text Senility refers to great losses of intellectual capacity that occurs in old age and is【C1】______with the wide- spread loss of nerve cells and the【C2】______of brain tissue. Senility is a great dec...
【单选题】细菌经紫外线照射会发生DNA损伤,为修复这种损伤,细菌合成DNA修复酶的基因表达增强,这现象称为
【判断题】光源色照射不到物体的部分即是暗面。这部分的色彩主要是环境色、固有色和暗色的混合,但色彩的明度和纯度都低于反光面。暗面的色彩与环境色联系密切,环境色的色感越强,暗面固有色的色感就越弱;环境色的色感越弱,暗面固有色的色感就越突出。