哮喘的治疗首选糖皮质激素，口服激素的说法正确的有
A. 可以作为控制性药物
B. 只能作为缓解性药物
C. 不能代替气道内激素
D. 毒副作用大，不可以使用
车速里程表由车速表和里程表两部分组成，车速表指示。
A. 发动机转速
B. 行驶速度
C. 加速时间
D. 行驶里程
What is the dialogue mostly about?
A. explaining a report
B. increasing bonuses
C. limiting advertising costs
D. generating income for a charity
The man thinks that TV advertising _____________
A. will be stopped.
B. should focus on charity.
C. caused profits to increase
D. wasn' t approved by executives
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