第一节：单词拼写（共10题，每题0.5分，共5分）

小题1:He is intelligent but he is lack of __________. (抱负)

小题2:Doing exercises is b_________ to both the physical and mental health.

小题3:The poor child was a__________ by his mother the whole night in hospital.

小题4:We should show _________(同情心) to the survivors in the earthquake.

小题5:The accident happened at midnight, so there was not a single _______. (目击证人)

小题6:The old couples are busy preparing their 50^th __________ (annual) of marriage.

小题7:Your supporting details must be __________ (切题的) to the topic.

小题8:This is an optional course, so the attendance is purely v___________.

小题9:You have to attend the meeting by yourself unless you find a ________. (替代者)

小题10:He did his best to c________ the unfortunate man.

多边形铁塔的各对应基础螺栓中心间距允许偏差不大于（）。