[单选题] 从事爆炸品道路运输的驾驶人员,应当经考试合格,取得注明为( )类别的从业资格证。
A.危险货物道路运输
B.剧毒化学品运输
C.爆炸品运输
D.特种货物运输

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Many people are afraid to assert (表现) themselves. Dr. Alberti thinks it’s because their self-respect is low. "Our whole {{U}} (48) {{/U}} is designed to make people distrust themselves," says Alberti. "There’s always {{U}} (49) {{/U}} around--a parent, a teacher, a boss--who ’knows better’. These superiors often gain when they chip (削弱) away at your self-image."
But Alberti and other scientists are doing something to help people. {{U}} (50) {{/U}} themselves. They {{U}} (51) {{/U}} "assertiveness training" courses--AT for short. In the AT courses people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to be more {{U}} (52) {{/U}} without hurting other people.
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