C型联合调节器控制转速从1000r/min下降到400r/min连续降速过渡时间约为20s。
参考答案:错
动词填空 (10分)
小题1:Would you please give me some advice on ____________(swim)?
小题2:I’d like to, but I have something ________________(wash) today.
小题3:Nothing ____________(be) difficult if we put our heart into it.
小题4:______________(not be) late for school.
小题5:Just now, Mr. Smith ____________(invite) us to join the skiing competition.
小题6:Don’t make any noise, Grandma ______________ (sleep).
小题7:I’ll wait here for your mother until she _______________ (return) from work.
小题8:The monkey ______________ (hide) themselves under the trees when it was rainy.
小题9:He with his friends usually ______________ (play) football after school.
小题10:What are yon going to do? How about _____________(go) out to play football?