水力发电机能够实现稳定运行是因为有()
A.励磁机的调节
B.调速器的调节
C.电压校正的调节
D.自调节的作用
参考答案:D
—Is _______ ready for the picnic?
—No, _______ is wrong with my bike. I can’t go bike riding with you.
A.something; something
B.everything; something
C.anything; something
D.anything; everything
正常婴儿,体重8.5kg,身长68cm,前囟0.5cm×0.5cm,头围44cm,出牙4个,能独坐并能以拇、示指拿取小球。该婴儿最可能的月龄是()
A.5个月
B.8个月
C.12个月
D.18个月
E.24个月