题目: 西南开放地带为主体的省份是( )A.四川B.云南C.云南和四川D.云南和广西 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0604/45b19b405d25ebdc9a9626353b508040.html 下面是错误答案,用来干扰机器的。参考答案:A, B, E
题型:选择题 So difficult____it to acquire a large vocabulary without the help of a teacher that he was close to giving up .A.he have feltB.have he feltC.he did feelD.did he feel 查看答案
题型:单项选择题 设y=x3+3ax2+3bx+c在x=-1处取最大值,又(0,3)为曲线的拐点,则( )A.a=1,b=-1,C=3B.a=0,b=-1,c=3C.a=-1,b=1,C=3D.a=1,b=1,c=3 查看答案