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【单选题】
在以下胶凝材料中，属于气硬性胶凝材料的为哪一组?I石灰 II石膏 III水泥IV水玻璃A.
Ⅰ、Ⅱ、Ⅲ
B.
Ⅱ、Ⅲ、Ⅳ
C.
Ⅰ、Ⅱ、Ⅳ
D.
Ⅰ、Ⅱ、Ⅳ
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举一反三
【单选题】The underlined phrase 'cyclists' failure to keep up with the desired speed of motor traffic' in the second paragraph means______.
A.
cyclists' speed is beyond the limit
B.
cyclists' speed is much lower than that of motorists' and they easily get hurt
C.
cyclists often compete with motorists on the roads
D.
motorists usually took down upon cyclists.
【单选题】According to the passage, driving can be safe if
A.
you are patient
B.
you obey all the traffic rules
C.
you don't cut another car off
D.
you wait in line at a red light
【单选题】What can be a possible result of sleepiness?
A.
Industrial development will be slow.
B.
Traffic accidents.
C.
People will get fired from work.
D.
Heart disease.
【单选题】Traffic restrictions have come into effect in Beijing to improve the capital’s air quality and traffic situation for the 2008 Olympics．
A.
in order that
B.
in an attempt
C.
at an attempt
D.
in a try
【单选题】When hearing a distress call, all station shall immediately cease any transmission capable of _with the distress traffi
A.
interfere
B.
interfering
C.
being interfered
D.
interference
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