肾穿刺的肾组织在解剖显微镜下肾小球呈()。
A.红 * * 状
B.针尖大小的白色点状
C.针尖大小的黄色点状
D.针尖大小的红色点状
E.黄 * * 状
参考答案:D
—It's dark (黑的) now, and I can't see anything.
—The light is behind the door, you can _________. [ ]
A. open it
B. turn on it
C. turn it off
D. turn it on
点M(2,3,1)到平面x+y+3z-5=0的距离是()。
A.2
B.
C.
D.