Electronic cigarettes will face new (36) in the US, the US Food and Drug Administration (37) yesterday. These will include curbs on sales to minors and distribution of free samples, as well as provisions forcing manufacturers to place health warnings on packaging. The long-awaited proposals—which also demand that the manufacturers should disclose all the ingredients in details and make claims of (38) risk only if scientifically validated—are less stringent 严厉的) than the Europe legislations voted on in February. (39) the proposed restrictions doing nothing to control advertising or curbing the sale of flavored products with names such as "Very Berrylicious", (40) of e-cigarettes claim that they are more (41) and scientific than the EU rules. "This is much less onerous than the European Tobacco Products directive," says Gerry Stimson, a UK consultant who supports "least harm" solutions to health problems. "It is clear that the FDA process, (42) the EU, follows the science, but this is just a first step and the regulatory process could take years, during which the products and the market will develop." The proposals will likely (43) further debate for and against e-cigarettes, which can resemble real cigarettes but contain no tobacco, only a vaporized form of pure nicotine that users breathe in and out. Backers of e-cigarettes say they have great (44) to help hardened smokers quit or cut down, because unlike other nicotine replacement products, they closely (45) cigarettes, both in appearance and use. A. popular B. restrictions C. potential D. importance E. despite F. provoke G. announced H. like I. resemble J. proponents K. maintain L. pragmatic M. claim N. reduced O. unlike