【简答题】听力原文:What did girls expect to do two generations ago? What did girls expect to do two generations ago? Girls expected to enter into ______.
【单选题】有时为了医治一些危重病人,医院允许使用吗啡作为止痛药。其实,这样做是应当禁止的。因为,毒品贩子会通过这种渠道获取吗啡,对社会造成严重危害。 通过这段话我们可以知道 。
【单选题】Non-indigenous (non-native) species of plants and animals arrive by way of two general types of pathways. First, species having origins outside the United States may enter the country and become estab...
【单选题】Non-indigenous (non-native) species of plants and animals arrive by way of two general types of pathways. First, species having origins outside the United States may enter the country and become estab...
A.
Human factors affect species movement rates more than its long-term amount.
B.
Natural expansions of species account for their slow natural contractions.
C.
Natural environments created by human activities contribute much to species movement.
D.
Long-range movement of species depends on the geographic extent of human mobility.