哽塞的共通性症状是()
A.弯腰并用力压住自己的腹部
B.用力按摩心前区并呈现痛苦面容
C.不自觉地抓住自己的颈部
D.全部都是
参考答案:C
With the help of the Internet, news can every corner of the world. [ ]
A. arrive
B. reach
C. go
D. get
用于口腔内消毒的碘酊浓度为
A.2%
B.3%
C.1%
D.0.5%
E.4%