Why the individuals, companies as well as governments are desperate for farmland?
A．Because people get food mainly from farmland.
B．Because 50 million acres farmland vanish each year.
C．Because farmland is the potential investment.
D．Because people see the farmland as the root of all commodities.

未分类题The word 'backfire'(Line 3, Para. 8)most probably meansA．to come to their senses.B．to produce helpful results.C．to make little progress.D．to get an outcome against the purpose.

未分类题We may infer from the last paragraph thatA．treating burn victims is not a problem now.B．real skin replacement means skin grafts with rejection.C．people at the Army medical center has grown each soldier's graft.D．one way to treat burn victims is to grow a patient's own skin as a graft.

未分类题What was the result of doubling the funding from $42.5 million to $85 million over 5 years?A．There would be much more wounded people who can be cured.B．Another consortium could come in to compete with the planned one.C．Researchers in the consortia's 28 research groups could get more public and private funds to match DOD's input.D．Robert Vandre would change the consortium to a larger one.

单项选择题氨苄青霉素可采用的含量测定方法是:()

单项选择题人体肝细胞属于()