| {{B}}One Good Reason to Let
Smallpox Live{{/B}} It’s now a fair bet that we will never see the total extinction(灭绝)of the smallpox(天花)virus. When smallpox was completely got rid of in the world,scientists wanted to {{U}} (51) {{/U}}the killer virus in the last two labs -- one in the US and one in Russia. They asked:If smallpox has truly gone from the planet,{{U}} (52) {{/U}}point was there in keeping these reserves In reality,of course,it was naive to{{U}} (53) {{/U}}that everyone would let go of such a powerful potential weapon. Undoubtedly several nations still have{{U}} (54) {{/U}} vials(小药瓶). And the last "official" stocks of live Virus bred mistrust of the US and Russia,{{U}} (55) {{/U}}no obvious gain. Now American researchers have{{U}} (56) {{/U}} an ani A. handle B. tackle C. treat D. deal [单选题]安全生产工作应当以人为本，坚持（ ），坚持安全第一、预防为主、综合治理的方针，强化和落实生产经营单位的主体责任，建立生产经营单位负责、职工参与、政府监管、行业自律和社会监督的机制。
A.科学发展 B.安全发展 C.可持续发展 D.综合发展 [判断题]固定翼无人机巡检系统可用于通道巡检，旋翼无人机只能用于精细化巡检。
A.正确 B.错误 [判断题]使用客列尾的旅客列车，尾部加挂客车不得超过2 辆。
A.正确 B.错误 [单选题]对二尖瓣狭窄程度的判定最有价值的检查是（ ）。
A.听诊 B.胸部X线摄影 C.心电图检查 D.胸部CT扫描 E.二维超声心动图检查 [单选题]夜间会车应当在距相对方向来车()米以外改用近光灯，在窄路、窄桥与非机动车会车时应当使用近光灯。
A.200 B.100 C.150 D.50 [多项选择]病程中，易出现黄疸和胆囊肿大的疾病是
A. 急性胆囊炎 B. 胆总管结石 C. 壶腹部肿瘤 D. 胰体癌 [简答题]The study also showed that, contrary to what people believe, if you skip breakfast, you will not lose weight. This is because people become so hungry if they skip breakfast that they eat too. much for lunch and end up gaining weight instead of losing. So remember, if you are on a diet, skipping breakfast will not help you.
[多选题]地形图中，一般把( )的地形图称为中比例尺地形图。
A.1:5000 B.1:10000 C.1:25000 D.1:50000 E.1：100000 [不定项选择题]A.开宣肺气
A.降逆止咳 B.宣散风热 C.开窍 D.消散痈肿 E.桔梗的功效是( ) [判断题] 任何组织或者个人不得以任何理由在任何情况下侵犯公民的通信自由和通信秘密
A.正确 B.错误 [单项选择]异步电动机空载时的效率是（）
A. 25％～30％ B. 铭牌效率的30％ C. 0 D. 空载电流与额定电流比值的百分数 我来回答: 提交
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