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【单选题】
已知:x(t)=A[u(t)- u(t-1)] , h(t)=u(t-1)- u(t-3), 则 ( )。 A 是常数A.
A(t-1) u(t-1)-A(t-4) u(t-4)
B.
(t-1) u(t-1)-(t-2) u(t-2) -(t-3) u(t-3) +(t-4) u(t-4)
C.
At u(t)-A(t-1) u(t-1)-A(t-2) u(t-2)-A(t-3) u(t-3)
D.
A(t-1) u(t-1)-A(t-2)u(t-2)-A(t-3)u(t-3) +A(t-4) u(t-4)
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【多选题】在故障树分析中，逻辑门只描绘事件间的逻辑因果关系，下列叙述中正确的有()
A.
与门表示至少一个输入事件发生时，输出事件就发生
B.
或门表示仅当所有输入事件发生时，输出事件才发生
C.
异或门表示仅当单个输入事件发生时，输出事件才发生
D.
禁门表示仅当条件事件发生时，输入事件的发生方导致输出事件的发生
【多选题】社会主义时期民族问题将长期存在是因为()。
A.
民族特点、民族差别还将长期存在。民族间事实上不平等的存在也是长期的
B.
在社会主义社会阶级斗争还没有消失，国际国内的阶级矛盾和斗争还会反映到民族问题上来
C.
历史上遗留下来的民族偏见、民族隔阂的残余，也不可能在短期内完全消除
D.
资产阶级民族主义影响的长期存在，是社会主义时期民族问题长期存在的一个原因
【单选题】【R1】 THE BUSH CROWD BRISTLES AT THE USE OF THE 'Q-WORD'—QUAGMIRE(沼泽)—TO DESCRIBE AMERICAN INVOLVEMENT IN IRAQ. BUT WITH OUR SOLDIERS FIGHTING AND DYING WITH NO END IN SIGHT,WHO CAN DENY THAT MR. BUSH ...
A.
IT WAS AN IMMATURE DISPLAY OF STREET-CORNER MACHISMO(男子气概)THAT APPALLED PEOPLE FAMILIAR WITH THE AGONIZING ORDEALS OF COMBAT.
B.
THE AMERICAN DEATH TOLL IN IRAQ AT THAT POINT WAS ABOUT 200, BUT IT WAS CLEAR THAT A VICIOUS OPPOSITION WAS DEVELOPIN G.
C.
THIS IS ANOTHER EXAMPLE OF THE ADMINISTRATION'S INABILITY TO DISTINGUISH BETWEEN A STRATEGY AND A WIS H.
E.
SOME WERE LITTLE MORE THAN CHILDREN WHEN THEY SIGNED UP FOR THE ARMED FORCES,LIKE RAMONA VALDEZ, WHO GREW UP IN THE BRONX AND WAS JUST 17 WHEN SHE JOINED THE MARINES. E. THE LATEST FANTASY OUT OF WASHINGTON IS THAT AMERICAN-TRAINED IRAQI FORCES WILL ULTIMATELY BE ABLE TO DO WHAT THE AMERICAN FORCES HAVE NOT:DEFEAT THE INSURGENCY AND PACIFY IRAQ.
F.
THAT HAS NOT BEEN THE CASE,WHICH IS WHY WE CAN EXPECT TO REMAIN STUCK IN THIS TRAGIC QUAGMIRE FOR THE FORESEEABLE FUTUR E.
【单选题】In the meeting, our Board of Directors ________ him, and so at 30, I was out.
A.
sided with
B.
sided against
C.
side on
D.
side at
【多选题】在故障树分析中，逻辑门只描绘事件间的逻辑因果关系，下列叙述中正确的是（）。
A.
与门表示至少一个输入事件发生时，输出事件就发生
B.
或门表示仅当所有输入事件发生时，输出事件才发生
C.
异或门表示仅当单个输人事件发生时，输出事件才发生
D.
禁门表示仅当条件事件发生时，输人事件的发生方导致输出事件的发生
【单选题】【R2】 THE BUSH CROWD BRISTLES AT THE USE OF THE 'Q-WORD'—QUAGMIRE(沼泽)—TO DESCRIBE AMERICAN INVOLVEMENT IN IRAQ. BUT WITH OUR SOLDIERS FIGHTING AND DYING WITH NO END IN SIGHT,WHO CAN DENY THAT MR. BUSH ...
A.
IT WAS AN IMMATURE DISPLAY OF STREET-CORNER MACHISMO(男子气概)THAT APPALLED PEOPLE FAMILIAR WITH THE AGONIZING ORDEALS OF COMBAT.
B.
THE AMERICAN DEATH TOLL IN IRAQ AT THAT POINT WAS ABOUT 200, BUT IT WAS CLEAR THAT A VICIOUS OPPOSITION WAS DEVELOPIN G.
C.
THIS IS ANOTHER EXAMPLE OF THE ADMINISTRATION'S INABILITY TO DISTINGUISH BETWEEN A STRATEGY AND A WIS H.
E.
SOME WERE LITTLE MORE THAN CHILDREN WHEN THEY SIGNED UP FOR THE ARMED FORCES,LIKE RAMONA VALDEZ, WHO GREW UP IN THE BRONX AND WAS JUST 17 WHEN SHE JOINED THE MARINES. E. THE LATEST FANTASY OUT OF WASHINGTON IS THAT AMERICAN-TRAINED IRAQI FORCES WILL ULTIMATELY BE ABLE TO DO WHAT THE AMERICAN FORCES HAVE NOT:DEFEAT THE INSURGENCY AND PACIFY IRAQ.
F.
THAT HAS NOT BEEN THE CASE,WHICH IS WHY WE CAN EXPECT TO REMAIN STUCK IN THIS TRAGIC QUAGMIRE FOR THE FORESEEABLE FUTUR E.
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