题目内容
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[主观题]
Keller由______的实验事实证明了结晶高聚物有______结构。Flory由的实验结果证明了非晶态高聚物之由______结
构组成。
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A.必须对足够多的对象进行研究才有价值
B.研究得出的结论只是近似的
C.研究的结论可以通过实验证明
D.只能用过去发生的事实证明
According to Helen Keller, life is either_______ or nothing.
A.a daring adventure
B.something
C.everything
D.anything
Helen Keller's ______ over deafness, blindness, and muteness was a miracle.
A. improvement B. success
C. advance D. triumph
Helen Keller learnt to ______.
A.care for children.
B.express herself.
C.travel alone.
D.use her physical strength.
Helen Keller is remembered as ______.
A.a political leader.
B.an example to others.
C.a famous scientist.
D.an extraordinary doctor.