题目内容
（请给出正确答案）
[主观题]
According to Bruce Alberts, science can serve as ______.A．a protectorB．a judgeC．a criticD．
According to Bruce Alberts, science can serve as ______.
A．a protector
B．a judge
C．a critic
D．a guide
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H抗原是
A.菌体
B.鞭毛素
C.荚膜
D.脂多糖
E.外膜蛋白
