气瓶瓶阀发生冻结现象时,可用( )热水解冻,严禁火烤。
A.100℃
B.80℃
C.60℃
D.40℃
参考答案:D
________ the students went to the gym to watch the football match.
A. Five hundred
B. Five hundreds of
C Five hundred of
D. Five hundreds
正常 * * 分泌物,不正确的是()
A.呈酸性
B.球菌极少
C. * * 杆菌较多
D.白细胞较多
E.鳞状上皮细胞较多