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Halley made his discovery ______.
A．by doing experiments
B．by means of his own careful observation
C．by using the work of other scientists
D．by chance
答案
更多“Halley made his discovery ______.A．by doing experimentsB．by means of his own careful obser”相关的问题
第1题
Halley made a surprising, but correct prediction in the year ______.
A．1704
B．1705
C．1706
D．1707
第2题
This passage in general is about ______.
A．Halley and other scientists
B．the orbit of a comet
C．Newton and Halley
D．Halley and his discovery
第4题
第5题
There is no point______with him, since he has already made up his mind.
A．argue
B．to argue
C．in arguing
D．of arguing
第6题
We all ______ the achievements he has made in his experiments.
A．admire
B．adopt
C．advise
D．adjust
第7题
A、why
B、how
C、that
D、for
第9题
A.statements
B.symbol
C.symptoms
D.sign
第10题
His extravagant lifestyle. made me ______ that many children are still in hunger!
A.entertain
B.thrill
C.astonish
D.conclude
