海藻的功效是（）
A．降气祛痰
B．敛肺平喘
C．清热滑痰
D．和胃降逆
E．软坚消痰
参考答案：E
If you are an energetic person with p views as to the right way of doing things, you find yourself ______ under pressures.
A．variably
B．invariably
C．invaluably
D．invalidly
两个频率不同都具有60方的声音，合成后的响度级为( )方。
A．60 B．70 C．80 D．120
