为加强对西北边疆的管理和防务,收复新疆后,清政府在新疆设立了行省。( )
同卵双生的兄弟长得很像的主要原因是( )
( A )
Report Card
Name: James Smith
Time: January 24th, 2015
Subjects
Grades
Comments(评语)
English
B+
Your reading and writing are good. But you have a strong accent(口音), so you are not good at speaking. And you do not put much effort into this subject. If you work hard, you can get a better grade in this subject.
Physics
A+
You are good at this subject. You are hardworking. I am glad that you do best in this subject.
Math
C
You like this subject. But you are not good at this subject because you are a little lazy. It is disappointing.You can do better if you try your best.
Music
B
It is a happy thing to hear you play the piano. You are crazy about music. Although you like this subject best, your accent has a bad influence on your singing.
阅读以上成绩单,根据表格内容完成以下问题
给出下列四个命题:(1)如果某圆锥的侧面展开图是半圆,则底面半径和母线之比为1:2;(2)若点A在直线y=2x-3上,且点A到两坐标轴的距离相等,则点A在第一或第四象限;(3)半径为5的圆中,弦AB=8,则圆周上到直线AB的距离为2的点共有四个;(4)若A(a,m)、B(a -1,n)(a0)在反比例函数y=4x的图象上,则mn。其中,正确命题的个数是( )