Low-cost wood "mix and match" expensive wood …

Recently, the price of redwood has soared after years of fine-tuning. The spread of different wood species has widened, which has brought opportunities to some unscrupulous merchants. "For example, the 8,000 yuan / ton balsam bean and the 30,000 yuan / ton Burmese rose pear smell close, as lon-----

Chemical Gold V8.051 registered version

The software is a set of professional typesetting auxiliary software customized for chemists based on the WORD platform. With this software, you can easily implement the isotope input, atomic structure diagram, electronic formula, electron transfer annotation, organic structure formula, and organic -----