For the second trial, the apparatus was covered by a sheet of plastic. () that this modification would reduce the amount of scattering.
A.We believe
B.I believe
C.It was believed
D.It is believed
正确答案:It was believed
For the second trial, the apparatus was covered by a sheet of plastic. () that this modification would reduce the amount of scattering.
A.We believe
B.I believe
C.It was believed
D.It is believed
正确答案:It was believed