（）是表现广告主题最直接的方式，并在广告中起着重要作用。
A、图形
B、广告语
C、符号
D、色彩
参考答案：B
光疗分解产物的刺激可造成
A．皮疹B．发热C．溶血D．青铜症E．腹泻
As a graducate in computer science, he ___ to work out the problem.
A．wouldn't have failed
B．can't have failed
C．mustn’t have failed
D．might not have failed
