地基土中，当塑性开展区的最大深度为0时，此时基础底面的压力称为（）荷载。 ["A.临界","B.临塑","C.极限","D.均布"]
为了保证食品安全，保障公众（），制定食品安全法。 ["身体健康和生命安全","人身安全","生命安全","身体健康"]
地球自转时，地轴倾斜的方向始终不变，北极总是指向（） ["北斗星","北极星","北斗星附近","北极星附近"]
科学虚构可以成立的主要根据是（）上的。 ["科学","逻辑","哲学","经验"]
Threefourths of the homework（）today. ["has finished","has been finished","have finished","have been finished"]
职业健康体检和一般健康体检有何区别？
