听力原文:M: I think the whole class is going on the field trip next Friday.
W: I am not so sure. You know not everybody can afford the transportation fee.
Q: What does the woman imply?
(15)
A.Some people may not go on the trip.
B.The transportation for the trip is free.
C.Everyone in the class has paid the fee.
D.The class won't enjoy going on the field trip.
第3题
理想的冠桩直径应为
A、根径的1/3
B、根径的1/2
C、根径的2/3
D、根径的3/4
E、根径的1/4
第9题
理想的冠桩直径应为
A.根径的1/4
B.根径的1/3
C.根径的1/2
D.根径的2/3
E.根径的3/4
第10题
理想的冠桩直径应为
A.根径的1/4
B.根径的1/3
C.根径的1/2
D.根径的2/3
E.根径的3/4
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