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【单选题】
直流稳压电源中滤波电路的作用是 ( )
A.
将交流变为直流
B.
将高频变为低频
C.
将交、直流混合量中的交流成分滤掉
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【单选题】MCS-51的并行I/O读-改-写操作,是针对该口的:
A.
引脚
B.
缓冲器
C.
地址线
D.
内部锁存器
【简答题】On a Friday night ,a poor young violinist was playing his violin at the entrance of the subway station .The music was so great that people down to listen and put some money into his hat . The next day...
【单选题】_________ a bottle of milk, some hot dog ,and hamburgers on the table. [     ]
A.
There are
B.
There is
C.
There have
D.
There has
【简答题】Mr. Green lived in a small town, but he worked in an office in a big city. So five days a week he went to work by train every morning and came home the same way. One morning he took out his newspaper ...
【简答题】句子翻译。 1. 公用电话在图书馆和车站之间。 The pay phone is _________the library _________the bus station. 2. 你长大后想干什么? _________do you want to _________when you grow up? 3. 沿着公路一直往前走,然后左拐。 Walk _________the road then _...
【单选题】___________ some water and two hot dogs on the table. [     ]
A.
There is
B.
There are
C.
Have
【简答题】John, a famous musician, took his priceless antique violin and played it in the crowded subway station. The music from the violin was delicately streaming throughout the whole station. However, during...
【单选题】205 某企业要销售一批产品,运输产品过程中产生的运输费、装卸费应计入()
A.
财务费用
B.
管理管理
C.
销售费用
D.
制造费用
【单选题】危重症病人口腔真菌感染护理时应选择的溶液是
A.
0.1%乙酸溶液
B.
朵贝尔溶液
C.
0.08%甲硝唑溶液
D.
2%~3%硼酸溶液
E.
1%~4%碳酸氢钠溶液
【单选题】He ______ the train if he hadn't been stack in traffic jam on the way to the railway station.
A.
couldn't miss
B.
wouldn't have misse
C.
mustn't have missed
D.
shouldn't miss
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