心气虚证与心阳虚证的共见症状是（）
A．形寒肢冷
B．面白神疲
C．心悸气短
D．脉细无力
E．舌质淡白
参考答案：C
下列物质分别在氧气中燃烧，没有气体生成的是（ ）
A．木炭
B．硫
C．石蜡
D．磷
There ______ snow in Canada every year. [ ]
A. has many
B. has much
C. are many
D. is much
