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【单选题】
急性经口染毒为了准确地将受试物染入消化道中 , 多采用 。A.
灌胃法
B.
喂饲法
C.
吞咽胶囊法
D.
饮水法
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皮皮学刷刷变学霸
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【简答题】样本98, 100 , 98 , 100 , 101 , 103 的样本平均数为( ),的样本方差为( )
【单选题】We can draw the conclusion that ______.
A.
3G signals and current signals transfer data at the same speed
B.
3G mobile phone service will not be allowed for its bad impact
C.
more tests would be done to check the results of the study
D.
second-generation mobile phones will take the place of 3G mobile phone
【简答题】Signals received from satellite can help gather data.
【单选题】Signals can be ________.
A.
digital
B.
analog
C.
either digital or analog
D.
neither digital nor analog
【简答题】样本98,100,98,100,101,103的样本平均数为( ),样本方差为( )。
【简答题】The body electronic module receives input signals from various sources, processes them and then sends output signals to various conmponents. The body electronic module can receive signals, process sig...
【单选题】Computers can only recognize( )signals.
A.
analog
B.
infrared ray
C.
light
D.
digital
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