绝对星等
参考答案:
假定把恒星放在距地球10秒差距(32.6光年)的地方测得的恒星的亮度。
Even after having their grandchildren live with them for ten years, the couple felt that ________children these days was the most difficult of all family matters.
A.rising
B.raising
C.caring
D.taking care
肾上腺皮质功能不全者,应从术前( )天开始给予适量的激素,以提高对手术的耐受力
A.5B.2C.3D.1E.4