题目

第三节 用适当的短语的适当的形式填空。 full of              stand close to                            be engaged in                  fill up with                      be addicted to  of the different sizes           make a difference go against 86. I want to write about people you seldom read about , for example people who have AIDS or who _______________ drugs. 87. Only by discovering what we do best can we hope to reach our goals and truly ______________________. 88. Both in the choice of m如图所示电路中，当开关S闭合后，灯L1、L2都发光．经过一段时间后，两灯突然同时熄灭，而电压表的示数变为6伏，已知开关S和电路完好，则产生这一现象的原因可能是 （   ） A．  灯L1短路 B．灯L2短路 C．灯L1断路 D．灯L2断路