【多选题】The dog was named Angel because he was thought to be the writer's ________ .
【单选题】How does Angel Falls get its name?
A.
A scientist named it Angel Falls.
B.
It's named after an American pilot who first discovered it.
C.
An American expedition named it Angel Falls.
【单选题】实施乡村振兴的精神所在和有力保障是()。
【判断题】在治疗性克隆方面的技术进步,将会削弱对生殖性克隆的禁止,形成克隆人的道德滑坡。
【多选题】乡村振兴的精神所在和有力保障是乡风文明,具体是指()。
【判断题】当电容器的容量和其两端的电压值一定时,若电源的频率越高则电路的无功功率越小。