平衡舵的特点是:()
①、舵叶压力中心靠近舵轴;
②、所需的转舵力矩小;
③、可相应减小所需的舵机功率;
④、结构简单
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WHO: Many
Children’s Deaths Preventable{{/B}} Over five million children die each year from disease, infections and accidents related{{U}} (1) {{/U}}their environment although many of these deaths are largely preventable, says the World Health Organization. On Monday, the WHO asked governments and citizens around the world to take action’ to create healthy{{U}} (2) {{/U}}for children as it celebrated world Health Day. "The biggest threats to children’s health lurk in the very{{U}} (3) {{/U}}that should be safest- home, school and community," said Dr. Gro Harlem Brundtland, director--general of the WHO at the day’s launch in New Delhi. India. "Every child has the right to{{U}} (4) {{/U}}up in a healthy home. school and commu A. reasons B. courses C. facts D. factors [单选题]无水氟化氢取样时,取样瓶中应提前装有()。
A.冰水 B.纯水机水 C.超纯水 D.冰块 [单选题]某分行系统内转贴现卖断一批电子商业汇票给总行金融市场部,票面金额50,000,000元,利率2.5%,票据剩余期限173天,实付金额为( )。
A.48750000元 B.50000000元 C.49399305元 [多选题]《普速中型车站服务质量规范》第6.2.1条,按规定实行实名制验证,核验( )的一致性。
A.车票 B.有效身份证件原件 C.旅客 D.购票人 [判断题]压下量过大可能造成主传动跳闸。 ( )
A.正确 B.错误 [简答题]对从事有毒有害作业的人员要进行哪几种体检?
[不定项选择题]由卫生部单独或与国务院有关部门联合制定发布的规范性文件是
A.卫生法规 B.卫生法律 C.卫生规章 D.地方性卫生法规 E.卫生标准 [多选题]安全电压是指对 不会引起生命危险的 。
A.人体 B.电压 C.电流 D.生物体 [单项选择]女性35岁,妇科体检发现左侧附件有一包块,4cm×5cm大小,光滑,囊性与子宫无粘连,活动良好,该患者月经正常,无阴道不规则出血。首先应考虑的诊断是()
A. 子宫肌瘤 B. 卵巢囊肿 C. 早孕 D. 宫外孕 E. 附件炎 [多选题]一般情况下,TDCS 3.0 系统内在区间()和()上均对应一个车次。
A.股道 B.道岔 C.信号机 D.闭塞分区 我来回答: 提交
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