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After a new-type coronavirus was detected in viral pneumonia cases in Central Chin’s Wuhan city a month ago, more cases have been reported in recent days. 1 : Wear masks outdoors Wearing a mask is one of the most effective ways to protect you from getting infected. Make sure to wear it properly by tightening up the nose clip and spreading germs to others. 2 , a mask is also needed to prevent you from spreading germs to others. Cover your coughs and sneeze with tissue Cover your mouth and nose with a tissue when you cough or sneeze, or you can cough or sneeze into your sleeve, but avoid covering with your hands directly. 3 Wash your hands with soap and running water thoroughly for at least 15 seconds. Before eating and after using the toilet After returning home After touching trash or garbage After contacting with animals or handling animal wastes Strengthen your immune system and exercise regularly Exercise regularly is one of the most important ways to help you stay away from catching any infections. Make sure that shared spaces have good air flow and avoid going to crowded places such as hospitals, railway stations and airports. 4 . Seek prompt medical attention if you have symptoms of fever and respiratory infection. Avoid close contract with people who have flu or cold-like symptoms. 5 . Avoid contract with wild animals or farmed livestock without any protection.
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【单选题】某小学五年级学生的语文考试平均分为76分,标准差是8.3分;百米跑步平均成绩为16.7秒,标准差是3.2秒。两个成绩中离散程度大的是______。
A.
百米跑成绩    
B.
语文考试成绩  
C.
一样大    
D.
无法比较
【判断题】褶皱轴面与褶皱岩层某一层面的交线称为轴线
A.
正确
B.
错误
【判断题】大米分为四个等级,最好的是标准三等米。
A.
正确
B.
错误
【判断题】褶皱轴面与褶皱岩层某一层面的交线称为轴线:
A.
正确
B.
错误
【多选题】大米分级标准是什么?
A.
硬胶稠度       米胶长度40mm或以下
B.
中等胶稠度    米胶长度40~60mm
C.
软胶稠度         米胶长度61mm以上
D.
胶稠度         米胶长度70mm以上
【单选题】某小学五年级学生的语文成绩平均分为 76分,标准差是8.3分;百米跑步平均成绩为16.7秒,标准差是3.2秒。两个成绩中离散程度大的是( )。
A.
百米跑步成绩
B.
语文考试成绩
C.
一样大
D.
无法比较
【单选题】某船从A港(吃水不受限)经B点到C港,船舶航速12节,TPC=13.6t/cm,(可视为不变),航行每天耗油水30 t,A港(ρ=1.025g/cm3)至B点(ρ=1.017g/cm3)航程为1003海里,B点最大允许吃水5.31m, B点至C港(ρ=1.005g/cm3)航程为913海里,C港最大允许吃水5.21m,则在A港船舶最大吃水为 m。(小吨位船试题)
A.
 5.34
B.
 5.31
C.
 5.21
D.
 5.25
【单选题】数控系统中CNC的中文含义是( )。
A.
计算机数字控制
B.
硬件数控
C.
计算机控制
D.
工程自动化
【单选题】确定最佳碾磨量和最佳碾磨时间,是以得到均匀的国家标准( )加工精度大米为判断标准。
A.
一级
B.
二级
C.
三级
D.
四级
【单选题】某船从A港(吃水不受限)经B点到C港,船舶航速12节,TPC=13.6t/cm,(可视为不变),航行每天耗油水30 t,A港(ρ=1.025g/cm3)至B点(ρ=1.017g/cm3)航程为1003海里,B点最大允许吃水5.31m, B点至C港(ρ=1.005g/cm3)航程为913海里,C港最大允许吃水5.21m,则在A港船舶最大吃水为----- m.
A.
5.34
B.
5.31
C.
5.21
D.
5.25
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