可作乳剂型气雾剂乳化剂的是
A．氟里昂B．C02压缩气体C．丙二醇D．聚山梨酯80E．胶态二氧化硅
参考答案：A
6米=______厘米=______毫米．
Most of us think of sharks as dangerous, owing to lack of information rather than fear.
A．due to
B．because
C．as
D．for
