2吨钢材比2吨棉花重．______．
2吨钢材和2吨棉花一样重，
因此，原题说法错误；
故答案为：错误．
However, at times this balance in nature is disturbed,_____ a number of possibly unforeseen effects.[ ]
A. lying in
B. calling in
C. resulting in
D. taking in
易燃易爆流体在输送停止后，方可进行检尺，测温，采样等作业。
