【单选题】关于电工材料,下列说法哪一种不正( )。
A.
外磁场消失后磁性基本消失的磁性材料称软磁材料
B.
外磁场消失后磁性基本保留的磁性材料称硬性材料,硬磁材料用于电气设备的铁心
【单选题】My sister works the hospital.
【简答题】D Multi-billionaire Robert F. Smith made headlines back in May for his pledge to pay off the student loan debt of an entire graduating college class — and now, he says that he is paying off the debt o...
【简答题】D Multi-billionaire Robert F. Smith made headlines back in May for his pledge to pay off the student loan debt of an entire graduating college class — and now, he says that he is paying off the debt o...
【单选题】()网站包括了《中国博士学位论文全文数据库》、《中国优秀硕士学位论文全文数据库》等多个数据库。
A.
中国国家图书馆(www.nlc.gov.cn)
B.
超星数字图书馆(www.ssreader.com)
C.
中国知网(www.cnki.net/index.htm)
【简答题】Enhancing all-round capabilities is the correct way forward to a prospective career. Appearance is not everything,” he says. What are the suggestions from Hu Xiaogen? Parents should offer objective an...
【单选题】中国优秀硕士学位论文全文数据库、中国优秀博士学位论文全文数据库的简称分别是哪几个字母?
【简答题】平行板电容器所带的电荷量为 Q=4×10-8C,电容器两板间的电压为U=2V,则该电容器的电容为多少?如果将其放电,使其所带电荷量为原来的一半,则两板间的电压为多少?两板间电场强度变为原来的多少倍?此时平行板电容器的电容为多少?
【单选题】如果把人生比之为杠杆,信念刚好像是它的“支点”,具备这个恰当的支点,才可能成为一个强而有力的人。对此解释不正确的是( )
B.
理想信念是激励人们向既定人生目标奋斗前进的动力