高血压病人容易发生心血管事件,10年内“很高危组”病人发生心血管事件可达
A.<15%
B.≥30%
C.≥50%
D.10%~15%
E.20%~30%
参考答案:B
He gave up smoking to_________ the money for his son’s education.
A.set out
B.set aside
C.set up
D.set down
加速器X线和电子束平坦度的允许精度是()
A.正负1%
B.正负2%
C.正负3%
D.正负4%
E.正负5%