庭荫树一般要求主干高()m。A1.8-2.0B2.5-3.0C1.2-1.5……

未分类题Despite budget cuts,______.A．the number of visitors to national parks has stayed steadyB．national parks have adapted wellC．more and more people are visiting national parksD．congressional leaders have paid little attention to the needs of national parks

未分类题The authors purpose in writing this text is______.A．to describe recent environmental policyB．to point out the difficulties inherent in protecting national parksC．to call for the protection of national parksD．to analyze the current status of national parks

未分类题According to the text, proposed legislation could______.A．raise awareness of the needs of national parksB．allow roads to go through national parksC．eliminate national parksD．help save national parks

未分类题Which of the following titles is most appropriate to the text?A．Remembering Lessons LearnedB．How to Save EnergyC．In Search of Alternative FuelsD．A Discussion of Global Warming

未分类题According to the text, the early warnings about smoking and the early warnings about global warming were similar because______.A．both were dismissed at first by those with vested interestsB．both ignored the underlying problemC．both failed to receive public supportD．both were successful in the end