| Every year more than half a million
American kids have drainage (排泄) tubes surgically implanted in their ears to
combat persistent infections. The procedure, known as tympanostomy, may not be
as{{U}} (62) {{/U}}as the tonsillectomy was in the 1940s, but it now{{U}}
(63) {{/U}}as the nation’s leading childhood{{U}} (64)
{{/U}}and a new study suggests it’s being vastly overused. In{{U}} (65)
{{/U}}more than 6,000 scheduled ear tube operations, a team of experts{{U}}
(66) {{/U}}by Harvard pediatrician Lawrence Kleinman found that fewer
than half were clearly justified. "Each year", the researchers write in the
current Journal of the American Medical Association (JAMA), "several hundred
thousand children in the United States may be{{U}} (67)
{{/U}}tympanostomy tubes that offer them no demonstrated{{U}} (68)
{{/U}}...and may place them a A. by B. upon C. with D. along [简答题]为什么工业自动化仪表多采用直流信号制?
[多选题]“金鹿-月月福”产品可操作的交易有（ ）。A.开立存单
B.存款证明
C.持有证明
D.账户移入
A.A B.B C.C D.D E.E F.F [单选题]重车重心高度从钢轨面起，超过( )时应限速运行。
A.2000mm B.1900mm C.1800mm D.1500mm [判断题]党的十八届四中全会提出， 初任法官、 检察官由高级人民法院、 省级人民检察院统一招录， 一般应在基层法院、 检察院任职。
A.正确 B.错误 [单选题]钢的低倍组织及缺陷进行仲裁检验时，若技术条件无特殊规定，应采用( )。
A.冷酸浸蚀法 B.混合浸蚀法 C.热酸浸蚀法 D.浸泡法 [单项选择]下列药物中不含有孕甾烷母核的药物是（）
A. 黄体酮 B. 炔诺酮 C. 醋酸地塞米松 D. 醋酸甲地孕酮 E. 苯丙酸诺龙 [单选题]妇科恶性肿瘤在普查中较早被发现的是
A.子宫颈癌 B.子宫内膜癌 C.内胚窦瘤 D.输卵管癌 E.阴道癌 [单选题]已知某投资项目的原始投资额现值为100万元，净现值为25万元，则该项目的现值指数为（ ）。
A.0.25 B.0.75 C.1.05 D.1.25 我来回答: 提交
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