5.除去雞蛋白膠體中混有的少量Cl-的最簡單方法是 ( )
A.加入少量硝酸銀溶液 B.加熱 C.電泳 D.滲析
4.下列盛放物質的方法:①把汽油放在帶橡皮塞的玻璃試劑中 ②把氫氧化鈉溶液放在帶橡皮塞的試劑瓶中 ③把硝酸放在棕色的玻璃試劑瓶中 ④把氫氟酸放在無色透明的玻璃試劑瓶中 ⑤把白磷放在水中,其中正確的是 ( )
A.①②③④⑤ B.②③⑤ C.①④ D.①②③
3.現(xiàn)有三組溶液:①汽油和氯化鈉溶液 ②39%的乙醇溶液 ⑧氯化鈉和單質溴的水溶液,分離以上各混合液的正確方法依次是 ( )
A.分液、萃取、蒸餾 B.萃取、蒸餾、分液
C.分液、蒸餾、萃取 D.蒸餾、萃取、分液
2.下列說法中正確的是 ( )
A.非金屬氧化物一定能與堿發(fā)生反應
B.金屬氧化物一定不能與堿發(fā)生反應
C.酸性氧化物一定能與水反應生成酸
D.酸性氧化物可能與酸發(fā)生反應
1.將下列各組物質按酸、堿、鹽順序排列,正確的是: ( )
A.硫酸、純堿、石灰石 B.醋酸、酒精、醋酸鈉
C.亞硫酸、熟石灰、小蘇打 D.石炭酸、熟石灰、明礬
13. We went through a period ___ communications were very difficult in the rural areas(上海卷).
A. which B. whose C. in which D. with which
12. They will fly to Washington, ___ they plan to stay for two or three days. (重慶卷)
A. where B. there C. which D. when
11. I’ll give you your friend’s home address, I can be reached most evenings. (北京卷)
A. which B. when C. whom D. where
10. Yesterday she sold her car, ______ she bought a month ago. (浙江卷)
A. whom B. where C. that D. which
9. For many cities in the world, there is no room to spread our further, _______ New York is an example. (四川卷)
A. for which B. in which C. of which D. from which
國際學校優(yōu)選 - 練習冊列表 - 試題列表
湖北省互聯(lián)網違法和不良信息舉報平臺 | 網上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權舉報專區(qū)
違法和不良信息舉報電話:027-86699610 舉報郵箱:58377363@163.com