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【判断题】
引起蛛网膜下腔出血最常见的原因是脑动脉硬化症。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】Each number shown below follows a certain rule. Figure out the rule and work out the missing number:
【单选题】The counter shown below is an example of
A.
an asynchronous counter
B.
a BCD counter
C.
a synchronous counter
D.
none of the above
【单选题】Research has shown that__________
A.
dropouts are substantially below PhD's in financial attainment
B.
the incentive factor is a minor one in regard to pursuing PhD studies
C.
the PhD candidate is likely to change his field of specialization if he drops out
D.
about one-third of those who start PhD work do not complete the work to earn the degree
【简答题】下列关于鹤虱与南鹤虱的表述正确的是( )。A.鹤虱是伞形科植物天名精的种子B.鹤虱是菊科植物天名精的果实C.南鹤虱是伞形科植物野胡萝卜的种子D.南鹤虱是菊科植物野胡萝卜的果实A. 1 B. 1 C. 1 D. 1
【单选题】What operation on relations R and S produces the relation shown below? ( ){tuple | tuple∈R∧tuple∈S}
A.
union
B.
difference
C.
intersection
D.
division
【单选题】The symbol shown below is a(n) ________, and the output will be ________ for the input shown.
A.
buffer, not A
B.
inverter, 1
C.
inverter, A'
D.
buffer, 1
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