2013年职称英语理工类B级阅读理解练习9_第3页

　　D. Origen is the leading company in producing embryo-locating machines.
　　45. The technology of freezing stem cells from different strains of chicken can do all the following EXCEPT that
　　A. farmers can order certain strains of chicken only.
　　B. Origen can supply all the strains of chicken the market might need.
　　C. chicken farmers order certain strains of chicken for economic reasons.
　　D. chicken farmers can be supplied with whatever strain they need.