入境船舶白天入境检疫时，夜间入境时，在船舶的明显处垂直悬挂红红白红灯四盏，表示本船有染疫或染疫嫌疑，请即刻实施检疫。
参考答案：对
当体温下降到24℃～26℃时，人就发生（）
A、血管硬化
B、失去知觉
C、发生死亡
Dear students, please read every sentence carefully.
The more _____ you are, the ______ mistakes you'll make. [ ]
A. carefully; fewer
B. careful; less
C. careful; fewer
