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【单选题】
再次免疫应答的特点是A.
抗体产生的诱导期长
B.
抗体产生快，维持时间短
C.
抗体主要是IgM
D.
抗体为高亲和性抗体
E.
TD抗原和TI抗原都可引起再次免疫应答
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【简答题】A．We'll have no need to find a job. B．We'll talk and play s with no one but the tools. C．We'll feel bored in our spare time. D．We'll enjoy more of life with machines doing everything for us.
【单选题】DDC在智能楼宇系统中主要应用于建筑设备监控系统，如空调、给排水、送排风等系统的监控，不包括( )。
A.
供配电监控系统
B.
照明监控系统
C.
电视监控系统
D.
电梯监控系统
【单选题】DDC在智能楼宇系统中主要应用于建筑设备监控系统,如给排水、空调、送排风等系统的监控,不包括( )
A.
供配电监控系统
B.
照明监控系统
C.
电视监控系统
D.
电梯监控系统
【单选题】--- We'll have a school trip to Shanghai next month. --- That sounds _______. I'm sure we'll have a good time there.
A.
well
B.
badly
C.
bad
D.
good
【单选题】We have made up our minds that we’ll go to Wales for our summer vacation, but we still have not ___________________ when we’re going.
A.
organized
B.
expressed
C.
settled
D.
performed
【单选题】We have worries _____ we'll miss the best selling season of the skirts.
A.
which
B.
that
C.
why
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