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【多选题】
关于直流电动机起动方式的选择，下列叙述不正确的有( )。A.
直流电动机应采用励磁回路串电阻方式起动
B.
直流电动机的起动电流不宜超过制造厂的规定值
C.
如经济条件允许，直流电动机可采用变频起动方式
D.
小型直流电动机可以直接起动
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【简答题】Why did the boys put out the fire?
【简答题】根据下图回答 86～90 题。 第 86 题 根据上图，下列说法正确的是（ ）。
【单选题】why did the geologists put up a fire to burn the gas?
A.
Because the ground has fallen down.
B.
ln order to explore more
C.
The gas is useless
D.
To stop the poisonous gases mixing with natural air
【简答题】根据下图，回答 121～125 题。 第 121 题
【单选题】Why did the geologists put up a fire to burn the gas?
A.
Because the ground has fallen down .
B.
In order to explore more .
C.
The gas is useless .
D.
To stop the poisonous gases mixing with natural air.
【简答题】根据以下图表，回答 66～70 题： 第 66 题
【单选题】Why did Diego say that Ripley had won the prize before he got to the fire station?
A.
、He smelled Ripley's strong stink and heard his booming bark.
B.
、He and Maggie had already searched every business in town.
C.
、He knew that lost dogs were sometimes taken to the fire station.
D.
、He heard someone say the winner was smelly and drooled.
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