The reason why dwarf novae explode is ______.A.not knownB.a cataclysmic variableC.that the
The reason why dwarf novae explode is ______.
A.not known
B.a cataclysmic variable
C.that they are twin stars
D.that they lose a small part of their mass
The reason why dwarf novae explode is ______.
A.not known
B.a cataclysmic variable
C.that they are twin stars
D.that they lose a small part of their mass
The reason why + 句子 ~~~ is that + 句子 (...的原因是...)
He is opposed (to) the project (for the reason) why it is not (feasible) (for the time being).
A.to
B.for the reason
C.feasible
D.for the time being
A.The reason why Michael Dell starts his business.
B.The reason why Michael Dell sells computers.
C.The reason why Michael Dell takes apart an Apple computer.
D.The reason why Michael Dell is successful at such a young age.
The reason (why) Jack (failed) to (attend) the lecture is (because) he had a bad cold.
A.why
B.failed
C.attend
D.because
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