工业企业中，应急照明、道路照明灯的端电压一般不宜低于额定电压的75%。( )
参考答案：错
Have you seen my book?I remember I put it ___________,but I can’t find it now.
A．somewhere
B．anywhere
C．everywhere
D．nowhere
So quickly are science and technology advancing is a possibility today may be a reality tomorrow.[ ]
A. that which
B. that what
C. what
D. which
