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【简答题】
柴油的使用性能指标主要有(__)、(__)、(__)和(__)。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列对糖果中还原糖测定说法不正确的是 ( )
A.
滴定时保持沸腾是防止次甲基蓝隐色体被空气氧化
B.
滴定终点显示粗鲜红色是 Cu 2 O 的颜色
C.
可用澄清剂除去蛋白质和有机酸的干扰
D.
用中性乙酸铅作澄清剂时可让过量铅留在溶液中
【单选题】Billy: Hi, I'm Billy. You're a new student, aren't you? Sandy: Yes, I am. My name is Sandy. And this is my sister. Billy: Hello!My name is Billy. What's your name? Sue: Nice to meet you. I'm Sue. What...
A.
Classmates.
B.
Friends.
C.
Brothers.
D.
Brother and sister.
【简答题】What happened in the 1950s and 60s that changed how people viewed the blues?
【单选题】下列对糖果中还原糖测定说法不正确的是( )
A.
滴定时保持沸腾是防止次甲基兰被空气氧化
B.
滴定终点显示砖红色是 Cu 2 O 的颜色
C.
可用澄清剂除去蛋白质和有机酸的干扰
D.
用中性乙酸铅作澄清剂时可让过量铅留在溶液中
【单选题】听力原文： Mrs. Robinson had one small, son. His name was Billy. Mrs. Robinson loved Billy very much, and as he was not a strong child, she was always afraid that he might get ill, so she used to take him ...
A.
Because he was ill.
B.
Because he was rather weak.
C.
Because he was always afraid.
D.
Because she loved him.
【单选题】What did you do ___________your day___________ ?
A.
at，out
B.
on，leave
C.
at，way
D.
on，off
【简答题】what( )
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