The scientists () thousands of chemicals before they could find an effective cure that is suitable for the disease.
A. tried out
B. ran out
C. turned out
D. picked out
A. tried out
B. ran out
C. turned out
D. picked out
The scientists(success) ______ launched the satellite in spite of all the difficulties.
Even talented scientists have no way to precisely forecast the future. (英译汉)
Scientists imagine such a change in weather on human population would be ______.
A.terrified
B.surprised
C.horrible
D.frightened
The scientists have made an______study of the viruses that cause the disease.
A.exhausted
B.exhausting
C.exhaustive
D.exhaustion
A.The veteran and middle-aged scientists are important, and so are the young ones.
B.The veteran, middle-aged scientists are important, and so are the young ones.
C.The veteran and middle-aged scientists are important, so are the young ones.
D.The veteran, middle-aged scientists are important, so are the young ones.
ACM was established by ______.
A.both mathematicians and electrical engineers
B.some scientists
C.computer engineers
D.some universities
A.A.true
B.B.false
A.The veteran and middle-aged scientists are important, and so are the young ones.
B.The veteran, middle-aged scientists are important, and so are the young ones.
C.The veteran and middle-aged scientists are important, so are the young ones.
D.The veteran, middle-aged scientists are important, so are the young ones.