【单选题】What do many scientists worry about the disease?
A.
There is no effective way of treating it.
B.
It may spread quickly among birds and poultry.
C.
It may affect the world economy and politics.
D.
It may change to an epidemic among human beings.
【单选题】晶体管的集电结和发射结均正向偏置,则它的工作状态是( )。
【单选题】晶体管的集电结反向偏置、发射结正向偏置,它的工作状态是( B ),若集电结和发射结都反向偏置,它的工作状态是( A ),若集电结和发射结均正向偏置,则它的工作状态是( )。
【单选题】Scientists Worry Machines May Outsmart Man A robot that can open doors and find electrical outlets to recharge itself. Computer viruses that no one can stop. 'Predator' fighters, which, though still c...
C.
artificial intelligence
【单选题】晶体管的集电结和发射结均正向偏置,则它的工作状态是( )。
【多选题】晶体管的集电结反向偏置、发射结正向偏置,它的工作状态是( ),若集电结和发射结都反向偏置,它的工作状态是( ),若集电结和发射结均正向偏置,则它的工作状态是( )。
【单选题】( )能激励美容师自觉完成职业道德的义务和责任。
【单选题】Which of these is NOT mentioned as a worry of some scientists?
A.
Genetically engineered crops are being developed too quickly.
B.
Something could go wrong when moving genes across dramatically different species.
C.
Genetically engineered crops are being released before they’ve been adequately tested.
D.
Genetically engineered species will pollute water and harm animals.