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问题
单项选择题
儿童的肝硬化可能是由于下列何种疾病引起:
A.肾胚胎瘤
B.进行性豆状核变性
C.神经母细胞瘤
D.克隆病
答案
参考答案:
B
选择题
About ______ of the workers in that steel factory ______ young people.
A. third fifths; are
B. three fifths; is
C. three fifth; is
D. three fifths; are
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问答题 简答题
活性酸度和潜性酸度的关系?
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