题目

_______ about wild plants that they decided to make a trip to Madagascar for further research..       A．so curious the couple was                    B．So curious were the couple       C．How curious the couple were                D．The couple was such curious 答案：B 解析：本题考查了倒装句。原句的主要结构是含有so…that的一个主从复合句，that引导的是结果状语从句。采用完全倒装的形式以示强调。如图所示，电源电压保持不变，灯L标有“6 V　0.6 W”字样，不考虑温度对灯丝电阻的影响．闭合开关S，当滑动变阻器的滑片P移动到中点时，灯L正常发光，电压表示数为4 V；当滑片P移到最大阻值时，灯L与滑动变阻器的电功率之比为_______．