[单项选择]"There is nothing new under the sun" really implies that
A. a new thing can only be created at the basis of earliest things
B. a new thing is only a tale
C. we can seldom create new things
D. we can hardly see really new things in the world

[填空题]A new high-performance contact lens under development will not only correct ordinary vision defects ______ (而且还可以提高正常的夜间视力) as much as five times.

[单项选择] Under existing law, a new drug may be labeled, promoted, and advertised only for those conditions in which safety and effectiveness have been demonstrated and which the Food and Drug Administration (FDA) has approved, or so-called approved uses. Other uses have come to be called "unapproved uses", and cannot be legally promoted. In a real sense, the term "unapproved" is a misnomer because it includes one phrase two categories of marketed drugs that are very different. It is common for new research and new insights to identify valid new uses for drugs already on the market. Before such advances can result in new indications for inclusion in drug labeling, however, the available data must meet the legal standard of substantial evidence derived from adequate and well-controlled clinical trials. Such evidence may require time to develop, and, without initiative on the part of the drug firm, it may not occur at all for certain uses. However, because medical literature on new uses exi
A. prohibiting the unlabeled use
B. permitting the disapproved use
C. allowing the practice of the unlabeled use
D. hastening their approval of the disapproved use