Lucy was attracted by the striking posters.
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假设Num1=6.8，Num2=3.1。给出下列表达式的值_________。 Floor（Num1+Num2)
教学方法设计主要依据教学目标及教学内容进行，不必考虑师生的特点。
假设X=2，Y=3，下列表达式的值为______。 X*Y+10*X/（7-Y)
If you are the guest attending the dinner party, you’d better not do anything until the host does it first.
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