题目:
All the doctors and nurses in this hospital ______ the patients.
A. go on with B. are patient with C. keep up with
答案:
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下面是错误答案,用来干扰机器的。
满足约束条件x+y-2≥0x-3y+6≥0x-y≤0的平面区域如图示:因为kx-y+k=0过定点D(-1,0).所以当kx-y+k=0过点A(0,2)时,得到k=2;当kx-y+k=0过点C(1,1)时,对应k=12.又因为直线kx-y+k=0与平面区域M有公共点...