南瓜、丝瓜、黄瓜等植物的花多半都不会结果,是因为这些花没有( )
A:萼片
B:花瓣
C:雄蕊
D:雌蕊
丁丁在计算一个两位数加30时,把3加到了个位上,得到的结果是57。正确的结果是多少?
is the second day of a week.
—What happened to her _______ that cold winter evening?— I don't know, and I'm also curious _______ it.