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【多选题】
关于定压充电,以下说法正确的是A.
定压充电初期，由于蓄电池的电动势较低，为避免充电电流过大而对蓄电池造成不利影响，通常需要用较低的电压充电，待蓄电池的电动势有所上升后，再以规定的电压进行定压充电
B.
充电电压过高容易造成充电初期充电电流过大和过充电
C.
充电电压过低则会使蓄电池充电不足
D.
采用适当的充电电压可使蓄电池在即将充足电充电电流趋于0
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【单选题】1 have read the news in China Daily the 2016 Olympic Games will be held in Rio de Janeiro, Brazil.
A.
which
B.
that
C.
what
D.
how
【简答题】阅读理解。 RIO de Janeiro (里约热内卢) will host the 2016 Olympic s. The International Olympic Committee (国际奥委会) announced it on October 2. Rio beat Chicago, Tokyo and Madrid to win the bid (赢得举办权). It will...
【简答题】是放线菌 伸展到空间的菌丝体,颜色较深、直径较粗的分枝菌丝,其成熟后分化成孢子丝
【单选题】The author implies that__________ ．A.economy should always be a nation’S first priority###
A.
The author implies that__________ ． A.economy should always be a nation’S first priority
B.
universities should take cost into account when they decide what courses they will offer
C.
successful musical plays are part of national economy
D.
economic growth is not the only need of mankind
【简答题】Rio de Janeiro(里约热内卢) will host the 2016 Olympic s. The International Olympic Committee announced(宣布) it on October 2,2009.Rio de Janeiro beat Chicago, Tokyo and Madrid to win the bid(中标).It will ...
【单选题】We studied the board critically. Some of us looked with one eye and held up certain colors against the blackboard, rocking the sheets to the right or left while we conjured up our designs. Others twis...
A.
formed an idea for
B.
made an outline for
C.
made some space for
D.
chose some colors for
【单选题】While fashion is thought of usually in relation to clothing, it is important to realize that it covers a much wider domain. It is to be found in manners, the arts, literature, and philosophy, and may ...
A.
fashion operates in every society
B.
fashion can be found only in a few fields of group life
C.
fashion originates in a class society
D.
people like to keep up with fashion in a primitive society
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