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为什么广大学生朋友配镜前最好能进行眼科检查（尤其是学生初次配镜）？

答案

参考答案：

因为有些学生的视力下降并非由近视或近视散光引起，可能是一些眼部疾病所导致。因此，在验光前应进行系统的眼科检查，区分是真性近视还是假性近视等。

选择题

联合国总部设在[ ]

A．日内瓦

B．纽约

C．北京

D．伦敦

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填空题

Beijing: The United States and North Korea had their first ______ in four months here this afternoon as part of the ______ negotiations on how to end North Korea’s nuclear program, but diplomats played down prospects for______. James A. Kelly, assistant ______, and Kim Yong Ⅱ, North Korea’s deputy foreign minister, met ______ of formal discussions, ______ on direct dialogue that began after a stormy meeting ______ in which North Korea warned that it was moving quickly to ______ nuclear arms. The Bush administration had insisted ______ that it would only hold talks with North Korea ______ because, it argued, only ______ pressure would persuade North Korea to______. It got its way when North Korea dropped its insistence on ______ and agreed, after extensive efforts by China, to hold unusual simultaneous negotiations with ______,______,______ and ______ as well as the United States. Though Bush administration officials had not ______ talking privately with the North Koreans during______, the fact that Mr. Kelly and Mr. Kim met on the first day was seen as a sign of ______ by the American side.
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