驾驶机动车在道路上掉头时提前开启左转向灯。
参考答案:对
某家庭电路上接有一台100W的电冰箱和两盏40W的日光灯,现要再使用一个20W的台灯,每当把台灯的插头插进插座时,电路里额定电流为1A的保险丝就熔断,发生这种现象的原因可能是( )
A.用电器的总功率太大
B.电冰箱电路时断时通
C.日光灯管损坏
D.台灯的插头内部有短路
. This English newspaper is believed to be a highly valuable one that ________ many events not found in other newspapers.
A.writes
B.covers
C.prints
D.reads