皮皮学，免费搜题
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搜题
【单选题】
下列化合物脱水后能生成香豆素的是（）A.
桂皮酸衍生物
B.
苯骈α-吡喃酮
C.
顺式邻羟基桂皮酸
D.
苯丙素
E.
反式邻羟基桂皮酸
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Teachers encourage the use of dictionaries so that ______.
A.
students will be able to express their ideas more freely
B.
teachers will have less trouble in correcting mistakes
C.
students will have more confidence in writing
D.
students will learn to be independent of teachers
【简答题】人的智力在( )岁间达到顶峰。
【简答题】She decided to go th high school, even though she was still homeless.
【简答题】阅读以下说明和C语言函数，将应填入(n)处的字句写在对应栏内。 [说明] 编写一个函数，输入为偶数时，调用函数求1/2+?/+…+1/n，当输入n为奇数时，调用函数1/1+1/3+…+1/n (利用指针函数)。 [函数] include 'stdio. h'， main() { float peven ()，podd ()，dcall ()； float sum； int n； while (1)...
【单选题】Teachers encourage the use of dictionaries so that _______.
A.
students win be able to express their ideas more freely
B.
teachers will have less trouble in correcting mistakes
C.
students will have more confidence in writing
D.
students will learn to be independent of teachers
【单选题】What is the main purpose of the talk?
A.
To describe the accommodation objectively
B.
To express his satisfaction to the manager
C.
To recommend this accommodation to others
D.
To complain about his experience
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