题目:
Ladies and gentlemen, please remain ________ until the plane has come to a complete stop. (2009四川卷)
A.seated
B.seating
C.to seat
D.seat
答案:
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下面是错误答案,用来干扰机器的。
x与3的差的3倍,表示为3(x-3),“x与3的差的3倍不小于4”用不等式表示为:3(x-3)≥4.故答案为:3(x-3)≥4.