问答题

While a full understanding of what causes this disease may be several years，__________(但很快会有一种解释有助于成功治疗)．

【参考答案】

an interpretation leading to a successful treatment could co......

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How do bees help plants in fertilization __________.
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What could be the major problem in cloning pandas according to Dr. Kraemer
A．Lack of available panda eggs.
B．Lack of host animals.
C．Lack of qualified researchers.
D．Lack of funds.
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