流行性腮腺炎的主要传播途径是（）
A.消化道传播
B.血液传播
C.母婴传播
D.蚊虫叮咬
E.飞沫传播
参考答案：E
After reading the school report, Tom really felt .
A．disappointed, disappointing
B．disappointing, disappointed
C．disappointing , disappointing
D．disappointed, disappointed
道氏理论认为，（）最为重要。
A．开盘价
B．收盘价
C．全天最高价
D．全天最低价
