红外光束线型感烟火灾探测器的探测区域长度不宜超过( )m。
A.200
B.150
C.100
D.50
参考答案:C
下列各句中,没有语病的一句是[ ]
A.12月6日,市教育局召开市直学校德育工作会议,全面部署明年市直学校德育工作,并仔细解读了市直班主任职级评定。
B.本次“瘦肉精”中毒事件发生的原因是由于外省个别不良生猪养殖户使用违禁“瘦肉精”喂养生猪,生猪经销者伪造检疫合格证逃避检验所造成的。
C.当时全校不止有一个文学社团,我们的“海风社”是最大的,参加的学生纵跨三个年级,并出版了最漂亮的文学刊物《贝壳》。
D.在美丽的天山脚下,随处可以听到牧民动听的歌声,不用说那些即兴哼唱的小调,就是那些出类拔萃的民歌,也能给人充分的艺术享受。
Customs officers at a London airport yesterday found $500000 worth of drugs which were being smuggled into Britain in boxes marked "Urgent Medical Supplies. " The (51) might have suspected for some time that the drugs were being brought into the country in this way. The (52) is believed to be the work of a well-organized international group. Four men were arrested at the airport and held for questioning, (53) it is unlikely that they are organizers. In fact, they declared that they were (54) of what the boxes contained and had acted in good faith in bringing (55) into Britain. This is the third time in six months that attempts have been made to smuggle (56) goods through Customs by declaring them to be medical supplies. They are frequently (57) in special containers and a warning is given that they may be (58) if they are not handled with care. They are determined to put a (59) to this practice, said one of the Customs officers today. (60) is no way these people are going to get away with this any longer. We have the full cooperation of the International Police who are as anxious as we are to track down the main source of supply.
54()。
A.unconscious
B.unaware
C.unfamiliar
D.unknown