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【单选题】
LF系列可编程序控制器计数器用( )表示。
A.
X
B.
Y
C.
T
D.
C
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【判断题】维生素C能够有效抑制肉品在烟熏过程中产生亚硝胺。(    )
A.
正确
B.
错误
【判断题】承运人在运输过程中,应当尽力救助患有急病、分娩、遇险的旅客。
A.
正确
B.
错误
【简答题】力对物体的作用效应取决于三个因素,分别是( )、( )和( )。
【单选题】Which is NOT the advantage of the nuclear stations?
A.
The nuclear stations are safer than the coal-fired stations.
B.
The cost of building the nuclear stations is more than that of the coal-fired stations.
C.
The cheaper running of the nuclear stations can offset its great construction.
D.
The nuclear stations are much cleaner than the conventional ones.
【单选题】which is safer?
A.
letter
B.
email
C.
nothing
D.
nothing1
【单选题】Taxis outside hotels are usually safer,but more_______ for the day hires,which charge more than the passing ones.
A.
pleasant
B.
attractive
C.
expensive
D.
efficient
【简答题】Which is safer --- staying at home, traveling to work on public transport, or working at the office? Surprisingly, each of these carries the same risk, which is very low.However, what about flying com...
【单选题】Which of the following is the best title for the passage?
A.
Making School Buses Even Safer for Children
B.
Seat Belts Needed on School Buses
C.
Alternate Safety Devices and Procedures
D.
Safety in and Around School Buses
【单选题】According to the passage, which of the following statements is correct?
A.
It is safer to put your money in a bank now.
B.
Vaults have huge, steel doors in a new style. bank.
C.
Guards on duty in a bank will not carry guns now.
D.
Bank clerks used to work in high sides and back chairs
【单选题】Which of the following statements is NOT true?
A.
Wood-bunting stoves are safer and more efficient than they used to be.
B.
No factories exist for the purpose of producing dirty wood chips.
C.
Both catalytic combustors and wood agitators save money in the long run.
D.
Wood-burning stoves with catalytic combustors cost between $ 100 and $ 200.
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