【单选题】It can be inferred from the passage that the sun ______ .
A.
is approximately halfway through its life as a yellow dwarf
B.
has been in existence for 10 billion years
C.
is rapidly changing in size and brightness
D.
will continue as a yellow dwarf for another 10 billion years
【单选题】They want to strengthen their relationship throug
A.
reforming the campanies
B.
taking in more parnters
C.
appointing a new general manager
【单选题】听力原文:A: After the way it is being used, the photocopier is not going to make it through the rest of the year. B: The year! It's supposed to be good for four! The tone of the man is that of______.
【简答题】直流电动机的主磁极是由()和励磁绕组组成。
【简答题】The Confucius Institutes aim at promoting the Chinese language and culture overseas through Internet or ___________ courses.