单项选择题 It was not until she took off the dark glasses I realized she was a famous film star.

单项选择题 给出以下定义：    char x[ ]="abcdefg";   char y[ ]={'a','b','c','d','e','f','g'}; 则正确的叙述为？

多项选择题 图示单向板阳台板， A、跨中板底受力筋，HPB300,直径8mm，间距200mm B、支座负弯矩筋（趴筋），HPB300，直径6mm，间距250 C、板厚300mm D、负弯矩筋（趴筋）从梁内边缘伸入板内的长度是300mm