【简答题】并励直流电动机,当电源反接时,其中Ia的方向 ,转速方向 。
【单选题】How does Nick feel at the end of the conversation?
A.
worried because he is running out of time.
B.
thankful because he has more information about Jackie Baker.
C.
angry because the receptionist won't let him see Jackie Baker.
【简答题】How does the author reply to the question?
【单选题】How does the doctor treat the injury?
A.
The doctor gives her some medicine.
B.
The doctor asks her to have a good rest.
C.
The doctor has a plaster cast on her leg.
D.
The doctor has her broken leg cut off.
【简答题】\t附子\t(1)是毛茛科植物乌头的子根加工品,而乌头的母根作为()使用。\t(2)主产地是四川(),最为著名。