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【单选题】
对于酸碱指示剂，下面说法全面且正确的是:A.
指示剂为有色物质
B.
指示剂为弱酸
C.
指示剂为弱酸或弱碱，其酸式或碱式结构颜色不同
D.
指示剂在酸碱溶液中颜色不同
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】最易并发颅底骨折或颅脑损伤的颌骨骨折是( )
A.
上颌骨LeFortⅠ型骨折
B.
上颌骨LeFortⅡ型骨折
C.
上颌骨LeFortⅢ型骨折
D.
下颌骨髁状突骨折
E.
下颌骨正中骨折
【单选题】A baby might show fear of an unfamiliar , ______ he is likely to smile and reach out to another infant.
A.
so that
B.
if
C.
whenever
D.
whereas
【单选题】She didn't bring the bad news to her mother______ that she might break down.
A.
so
B.
for fear
C.
in order
D.
because
【简答题】He set out early for the airport for fear that_____________________________________ (遇到交通拥堵而赶不上班机).
【单选题】______ recurring fear is out of proportion to any real er, it is called a phobia.
A.
When
B.
Whereas
C.
Which
D.
Whether
【单选题】A baby might show fear of an unfamiliar , ______ he is likely to smile and reach out to another infant.
A.
if
B.
so that
C.
whereas
D.
whenever
【单选题】He was never able to ask her to marry him out of fear of ________.
A.
ejection
B.
injection
C.
projection
D.
rejection
【单选题】A baby might show fear of an unfamiliar , ______ he is likely to smile and reach out to another infant.
A.
if
B.
whenever
C.
so that
D.
whereas
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