患者,男,42岁,1d前出现颈部活动受限,同时伴有疼痛,其诊断可能是下列疾病,除外
A.颈部软组织损伤
B.颈部肌肉扭伤
C.脑膜炎
D.肥大性脊椎炎
E.颈椎结核
参考答案:C
The worker keep_______ in order to make money for their living
[ ]
A. working
B. to work
C. work
D. works
催化剂硫化结束的标志之一是H2S浓度大于()。
A.1000pm
B.1%
C.10%
D.0.1%