题目内容
1) Sam was riding his bicycle to work. He was not aware that a speeding motorcycle was ____ him at across roads(十字路口), where it bumped into him and threw him ____. Sam fell to the ground and was badly injured. He ____ hospital for months before he recovered, and the accident left a permanent ____ his mind. He is now scared of motorcycles and has never since ridden a bicycle.(off balance, be laid up, gain on, scar)
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2) John was born ____ . Even after repeated ____, he still walks with a tilt. Despite his physical ____, he successfully completed his college education and developed an interest ____. He writes fascinating stories and his works enrich the life of millions of young readers.(literature, surgery,limitation, cripple)
3) John has recently found himself a job selling insurance. He works on straight ____. Most of the time,he is ____ but sometimes he sells door to door in some section of ____. He works so hard we are worried that it might be too great a strain on him. We tell him to slow the pace,but our advice ______ never registers with him. (territory, register,commission, on the phone)
11.09是四位有效数字，而pH＝11.09是两位有效数字。
阅读《电力系统电压和无功电力技术导则DL/T 1773-2017》，35kV及以上用户供电电压正负偏差绝对值之和不超过额定电压的
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