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【简答题】
在探究“影响蒸发快慢的因素”实验过程中,同学们作出了如下猜想:影响液体蒸发快慢的因素可能有:A.液体温度高低,B.液体的表面积,C.液面上气流的快慢,D.液体的种类. (1)某同学设计了如下实验:取两只相同的烧杯,分别盛等重的酒精,把一杯放在烈日下,另一杯放在阴凉处,一段时间后观察比较两杯中酒精的多少.该同学设计这个实验的目的是为了验证猜想______(选填“A”、“B”、“C”或“D”). (2)请你设计一个实验来验证猜想D.要求简要写出实验的方法.
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【多选题】在人体内,以下物质最终代谢为尿酸的是()
A.
腺嘌呤
B.
胸腺嘧啶
C.
鸟嘌呤
D.
胞嘧啶
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A.
正确
B.
错误
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A.
“重复执行”确定次语句
B.
“重复执行”语句
C.
“重复执行直到”语句
D.
A,B,C 均是
【单选题】According to a new study, happiness in life has more to do with respect and influence than wealth. Researchers say that they got interested in this idea because there is abundant 1 that higher income ...
A.
send
B.
presented
C.
rated
D.
selecting
【单选题】What does the woman say about her students?
A.
All of them prefer English to history.
B.
All of them enjoy learning English.
C.
Most of them do not spend enough time on their studies.
D.
Most of them study English very hard.
【单选题】仅用辅料制成干颗粒,再将药物与颗粒混合后压片的方法称
A.
湿法制粒法
B.
粉末直接压片
C.
空白颗粒法
D.
干法制粒压片
【简答题】Lily often goes to the 1 with her aunt. She can see all kinds of people and her aunt often tells her to be 2 to everyone. And she hopes 3 a polite girl. This morning Lily was having English class. Mis...
【单选题】According to a new study, happiness in life has more to do with respect and influence than wealth. Researchers say that they got interested in this idea because there is abundant 1 that higher income ...
A.
take away
B.
took out
C.
take part in
D.
took into account
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A.
All
B.
Many
C.
None
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