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【单选题】
关于重力势能下列说法中正确的是()。A.
重力势能只是由重物自身所决定的
B.
重力势能只是由重物自身所决定的
C.
重力势能是标量，不可能有正、负值
D.
重力势能具有相对性，所以其大小是相对的
E.
物体克服重力所做的功不等于物体重力势能的增加
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举一反三
【简答题】如果定时器控制器寄存器TCON中的IT1和IT0位为1，则外部中断请求信号方式为（）触发方式。
【单选题】听力原文： Sierra Leonean rebels and a progovernment militia have agreed to stop fighting in a bid to protect the country's shaky cease-fire and set a timetable for disarmament. The agreement comes on the ...
A.
ten-year
B.
eight-year
C.
eleven-year
D.
twenty-year
【单选题】The militia is a ________________ organization.
A.
quasi-victory
B.
quasi-military
C.
quasi-science
D.
quasi-office
【单选题】Why was Paul Sadala, the leader of DRC militia, pursued?
A.
Because he was the leader of a militia that attacked a conservation project.
B.
Because he was responsible for the death of some rare animals.
C.
Because he murdered six soldiers of a rival militia.
D.
Because he protested violently against the wildlife slaughter.
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