生态学指的环境是生物体以外的非生物环境。( )
参考答案：错
22.Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.
A．that
B．why
C．how
D．Whether
粉化后的熟料，其强度（）。
A.下降
B.上升
C.不变
