【单选题】优先编码器74HC148正常接地和电源,其编码输入端为: ,该芯片的输入使能端为0,其余输入端为1,则编码输出结果为( )。
E.
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【判断题】优先编码器74148的输入端 取值为001111111时,输出 的值为111。
【单选题】Thirst for Oil Worldwide every day, we devour the energy equivalent of about 200 million barrels of oil. Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the pla...
A.
Most of the energy on Earth comes from the Sun.
B.
Oil supply is increasing all the time.
C.
Demand for oil is increasing all the time.
D.
Oil supply is decreasing.
【单选题】交叉相遇条款要求让路船如环境许可应避免横越他船前方,这意味着()。1让路船应避免向左转向;2要求直航船增速以便增大两船的DCPA;3让路船如保持原航向,则不应采取加速措施。
【单选题】Thirst for Oil Worldwide every day,we devour the energy equivalent of about 200 million barrels of oil.Most of the energy on Earth comes from the Sun.in fact enough energy from the Sun hits the planet...
A.
Most of the energy on Earth comes from the sun.
B.
Oil supply is increasing all the time.
C.
Demand for oil is increasing all the time.
D.
Oil supply is decreasing.