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【多选题】
土壤微生物从细胞外环境中吸收摄取物质的方式主要有 。A.
主动运输
B.
被动扩散
C.
促进扩散
D.
胞饮作用
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举一反三
【单选题】—Hi, Tom. Is your brother as active as you? —No, he's a quiet boy. He is _________. [ ]
A.
less outgoing than me
B.
not so calm as I
C.
more active than I
D.
as outgoing as I
【单选题】The _______ work continued for more than a week but there was still no sign of the missing boy.
A.
research
B.
rescue
C.
vessel
D.
vast
【单选题】— Hi, what did our monitor say just now? — Every boy and every girl as well as teachers who are to visit Water Cube ______ asked to be at school gate before 6∶30 tomorrow morning.
A.
is
B.
were
C.
are
D.
was
【单选题】The little boy put the bird in a cage to ______ it from flying away.
A.
avoid
B.
prevent
C.
hinder
D.
resist
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