【单选题】What has given the first push to the great development of tourism?
A.
Related departments paid great attention.
D.
Rich tourism resources.
【简答题】外界空气由呼吸道出入肺的过程称为 ,肺泡与血液之间的气体交换称为 。
【简答题】外界空气经呼吸道出入肺的过程,称为(),肺泡与血液之间的气体交换称为()
【单选题】What did Native Americans on the Great Plains realize?
A.
Significance of making use of plants.
B.
Importance of living with animals’ maximum needs.
C.
Value of limiting use of natural resources.
D.
Necessity of following new models.
【简答题】外界空气由呼吸道出入肺的过程,称为_______;肺泡与血液之间的气体交换称为_______
【单选题】党员干部对理想信念的整体的动摇体现了党面临的什么危险()
【单选题】外界空气与肺泡之间的气体交换过程称作( )。