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【单选题】
在一个区段上,决定一台某一类型机车所能牵引的货物列车质量(最大值)的坡度,叫做( )。
A.
限制坡度
B.
加力牵引坡度
C.
动能坡度
D.
折算坡度
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参考答案:
举一反三
【单选题】Which statement about entering into a tank which has been sealed for a long time is TRUE ________.
A.
The tank should be tested only once to ensure the oxygen content is at least 14% before entry
B.
The tank must be tested at frequent intervals to ensure that hazardous gasses have not regenerated
C.
The tank need not be tested for oxygen content if it is ventilated for more than 24 hours
D.
If the oxygen content tests at less than 12% you should wear an approved gas mask
【判断题】有向图如果存在回路,则要素所对应的行与列在可达矩阵中相同,且可缩减( )
A.
正确
B.
错误
【单选题】网络零售是属于哪种类型的电子商务
A.
B2B
B.
B2C
C.
C2C
D.
O2O
【多选题】Which statement is correct for the concept of the word?
A.
Every word is a unity of the form and the meaning.
B.
Word is a cluster of letters between two blanks.
C.
A word is the fundamental unit of sentence structure.
D.
As for its internal structure, a word is the most stable unit in a language.
【单选题】Which statement about buying things for yourself is true?
A.
You feel good for a long time.
B.
You feel good for a short time
【单选题】Which statement is not true for 2019-nCoV?
A.
It can spread through contact
B.
It can be killed by 75% alcohol
C.
The weakened immune system can be hardly infected
【单选题】直流电路中某支路电流和电压为关联参考方向,电流绝对值大小为2A、电压绝对值大小为12V,则下列选项正确的是()。
A.
该支路吸收功率,大小为24W。
B.
该支路发出功率,大小为24W。
C.
可以确定该支路的功率绝对值大小为24W,但无法确定支路是吸收24W还是发出24W。
D.
该支路的功率大小无法确定。
【单选题】开始邮件合并前需要准备_______。
A.
主文档和数据源
B.
数据源和合并域
C.
文字域和照片域
D.
插入域和合并域
【单选题】支付宝实名认证( V1 )等级,需要的资料有( )。
A.
身份证和户口
B.
护照和银行
C.
身份证和银行卡
D.
户口和护照
【单选题】Which statement is true for cellulose, but not true for protein?
A.
It is found in cell surface membranes.
B.
It is synthesised from identical sub-units
C.
It is used as an energy source.
D.
It may be a structural component.
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