植物检疫
参考答案：
是国家用法律的形式严格禁止危险性有害生物随同植物或植物产品等介体人为远距离的传播的措施。
He bought a new car ______ engine was very powerful. [ ]
A. which
B. its
C. whose
催化剂能够加快其所催化的化学反应。
