题目内容

A.graduallyB.stronglyC.suddenlyD.incidentally

A. gradually
B. strongly
C. suddenly
D. incidentally

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A.aSB.whoC.whichD.that

A. aS
B. who
C. which
D. that

Russian and American scientists are working together to solve the problem of motion sickness in astronauts.

A. Right
B. Wrong
C. Not mentioned

A.broughtB.takenC.designed D.protected

A. brought
B. taken
C. designed
D. protected

A.abilityB.service C.systemD.channel

A. ability
B. service
C. system
D. channel

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