【单选题】In the U.S., the age-old problem of excessive drinking is taking a disturbing new turn and affecting new kinds of victims. On a New York subway train, a school-bound 15-year-old holds his books in one...
【单选题】5 ) _____ many educators and parents have praised the Harry Potter series , some Christian parents have called for a ban on the books in their schools and libraries. Some churches have even gone as fa...
【单选题】考拉以桉树的叶子为食。考拉与桉树之间存在什么样的生态相互作用? A koala feeds on leaves from eucalyptus trees. What type of ecological interaction exists between the koala and the eucalyptus?