山脉往往成为我国省级行政单位的天然界线,下列对应不正确的是
A:①-巫山
B:②-雪峰山
C:③-昆仑山
D:④-祁连山
They can't buy anything because _________ of the shops are open now
—I think teenagers should not be allowed to get car licenses.
—I agree. They are not _______.
用斜二测画法画一个水平放置的平面图形的直观图为如图所示的一个正方形,则原来的图形是( )
医院确认糖尿病的常用方法是将下列哪种试剂滴于尿样中?