【单选题】The author insists that the control of population should not be at the cost of ______.
A.
sacrificing the poor people's welfare
B.
losing something equally precious
C.
improving the environment
D.
reaching the equilibrium of population
【单选题】The librarian insists that John _____ no more books from the library before he returns all the books he has borrowed.
【简答题】阅读图文材料,完成下列要求。
下图为中国某区城图,图中A县适宜毛杜鹃等许多花卉生长,特别是桂花种植已有百年历史。早在20世纪80年代末,该县就开始发展花卉产业,近年花卉种植面积不断增加,并提出“打造乡土特色花卉基地”的区城规划目标。图中虚线为我国规划建设的沿海高速铁路在本区的分布。 A地气候素有“万紫千红花不谢,冬暖夏凉四序春”’的美誉,试分析形成这种现象的主要原因。
【单选题】John is in favor of going to the movies,______Mike insists on playing football.
【单选题】外斐试验是利用抗原抗体反应的哪个特点来协助斑疹伤寒病的诊断()。