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【多选题】
花坛色彩设计常用的配色方案有_____。A.
对比色应用
B.
类似色应用
C.
同色调应用
D.
补充色应用
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参考解析：
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皮皮学刷刷变学霸
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【简答题】说明巴比妥类药物在不同的 pH 条件下产生不同的紫外吸收光谱的原因。
【简答题】在空间任一给定点,正弦波的相位随时间的变化率为 ,而在任一给定时刻,相位随距离x的变化是 。若初位相是π/2,振幅是20且波沿正x方向前进,写出波函数的表达式、波的速率。
【单选题】— I haven’t got the reference book yet, but I’ll have a test on the subject next month. — Don’t worry. You ________ have it by Friday.
A.
could
B.
shall
C.
may
D.
must
【单选题】听力原文：M: I cannot find the reference book the teacher asked us to read. W: Why do you look for it on the shelves? Why don't you use the searching system in the computer downstairs? Q: What does the wom...
A.
He should try a better and convenient way.
B.
He should give up looking for the book.
C.
He should ask the librarian for help.
D.
He should try the shelves downstairs.
【单选题】— I haven't got the reference book yet, but I'll have a test on the subject next month. — Don't worry. You _____ have it by Friday. [ ]
A.
shall
B.
could
C.
must
D.
may
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