汽油的安定性差,可通过加入()来改善。
A.抗爆剂
B.阻燃剂
C.防胶剂
D.防腐剂
参考答案:C
女,34岁。婚后5年未孕,月经量逐渐减少。妇科检查子宫正常大小,双侧附件区稍厚。子宫输卵管碘油造影显示双侧输卵管均不通畅,管腔细而僵直,盆腔有散在钙化点。诊断为输卵管结核。应首选下列何种治疗最佳
A.卡那霉素和异烟肼
B.利福平和乙胺丁醇
C.异烟肼和乙胺丁醇
D.异烟肼和利福平
E.异烟肼、链霉素和对氨水杨酸钠
Today is Children's Day. There are lots of people inHappy Valley. It's very ______ .[ ]
A. busy
B. uncrowned
C. hot
D. crowded