Hurry up, Tom, ________you’ll be late for school. (1.0)
A. and
B. but
C. so
D. or
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The elephant’s legs are________than the dog’s. (1.0)
A. strong
B. stronger
C. strongest
D. the strongest
- Jack, ________you swim?- Yes, I can. (1.0)
A. can
B. may
C. need
D. must
发动机的性能指标有____指标、____指标、____指标和____指标。(第1、2空各填3个汉字,第3空填2个汉字,第4空填4个汉字)
发动机的动力性能指标主要有______和______。(每空填写4个汉字)