义齿基托加厚的常见部位如下,除外()
A.牙槽嵴吸收较多处
B.牙槽嵴缺损处
C.颊侧基托
D.唇侧基托
E.腭侧基托
参考答案:E
Foreign trade, the ____ of goods between nations, takes place for many reasons.
A.exchange
B.bargain
C.production
D.business
从事产前诊断技术(包括产前筛查技术)的医疗保健机构和人员由()卫生行政部门审批。