大量存在于肠道内,其单独致病力并不大,单纯感染产生的脓液无臭味()
A.铜绿假单胞菌
B.变形杆菌
C.链球菌
D.大肠埃希菌
E.葡萄球菌
参考答案:D
上前牙缺失的深覆患者,年龄较小时可以采用()
A.金属基托
B.垫式牙
C.双层牙列
D.压缩性义齿
E.金属颌面牙
用所给词的适当形式填空。
1. We are very _________ (surprise) at the news.
2. Several _________ (foreign) visited our school yesterday.
3. Doctors often tell us _________ (drink) more water every day.
4. The boss left his office _________ (angry) without saying a word.
5. We will have the meeting on the _________ (twelve) floor.