+5读作（ ），-2读作（ ），-5℃读作（ ）。
正五；负二；负五摄氏度
吸收系数是衡量光能转变为其他能的程度，主要由纸浆中发色基团的（）与（）所决定。
A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.
A．as results
B．which results
C．the results of it
D．the results of which
