心房分隔时,第一房间孔位于第一房间隔游离缘与心内膜垫之间。
参考答案:错
What the public is about is whether medical workers and scientists will be able to find a cure for the new disease in a short time.
A.concerning
B.concern
C.concerned
D.to concern
一个三角形的三个角的度数比是1:4:5,这个三角形是______三角形.