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【多选题】
下列关于排气筒监测采样时间与频次的说法正确的是( )。A.
排气筒中的废气采样，以连续1h的采样获取平均值，或在1h内，以等时间间隔采集3个样品，并计平均值
B.
无组织排放监控点和参照点采样，一般采用连续1h采样计平均值，若浓度偏低，需要适当缩短采样时间
C.
若某排气筒的排放为间断性排放，排放时间小于1h，则应在排放时段内实行连续采样，或在排放时间内以等时间间隔采集2～4个样品，并计平均值
D.
当进行污染事故排放监测时，应按需要设置采样时间和采样频次，不受《大气污染物综合排放标准》规定要求的限制
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【简答题】Identify what figures of speech are used in the following. 1. The sound of passing cars was a steady whisper out of the throat of night.
【多选题】What are the main duties of a hotel receptionist?
A.
Dealing with reservations and cancelations.
B.
Checking guests into/out of the hotel.
C.
Handling foreign exchange.
D.
Taking and passing on messages to guests.
E.
Dealing with complains or problems.
F.
Answering questions about facilities in the hotel and the surrounding are.
【简答题】What would the world be like if cars could drive themselves ? Imagine seeing an empty car passing by on its way to pick up its owner, or a car full of passengers who are reading, listening to music or...
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