According to Figure B, the scale value of this thermometer is 1℃, so the pointer of this thermometer is 99℃, which means the boiling point of water is 99℃. The boiling point is lower than that of 100℃ at standard atmospheric pressure, so the atmospheric pressure is lower than 1 standard atmospheric pressure.
So, the answer is: the glass bulb of the thermometer hit the bottom of the beaker; 99; Less than.