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【单选题】
关于酸碱指示剂下列哪种说法是不正确的A.
指示剂本身是一种弱酸或弱碱
B.
指示剂的变色点与溶液的体积有关
C.
指示剂的颜色变化与溶液的pH有关
D.
指示剂的变色与指示剂常数有关
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反馈参考答案：
举一反三
【单选题】While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.
A.
occasionally
B.
simultaneously
C.
eventually
D.
promptly
【单选题】. While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
A.
occasionally
B.
simultaneously
C.
eventually
D.
directly
【单选题】While typing, Helen has a habit of stopping ______ to stroke her long and flowing hair.
A.
occasionally
B.
simultaneously
C.
eventually
D.
endeavours
【单选题】While reading, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.
A.
occasionally
B.
eventually
C.
automatically
D.
absolutely
【简答题】There’re a lot of _____(彩色)flags when the new term begins.
【简答题】While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth. A now and then B.over and over C.up and down D.here and there
【简答题】请根据下列音标写出相应的单词。 / sneɪk / 2. / ˈrektæŋɡl] / 3. / 'paɪlət // 4. / ˈtræktə(r) / 5. / ˈtenɪs / 6. / ʃi: p/ 7. / θʌm/ 8. / ˈbəʊlɪŋ / 9. / 'mæŋɡəʊ/ 10. / 'æktə(r)/
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