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电子小报框架、报头设计——保存成“第一关任务——姓名”并提交
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【单选题】—The shoes are very nice. I'll take them. —But you must _____ first. I think the size is a bit smaller for you. [ ]
A.
pay for them
B.
try them on
C.
put them on
D.
take them off
【单选题】The number of red-crowned cranes is getting ___________.
A.
small and small
B.
little and little
C.
smaller and smaller
D.
less and less
【单选题】The population of China is _____ than that in Australia. [ ]
A.
far more
B.
much larger
C.
much smaller
D.
far less
【单选题】The number of pandas(熊猫) becoming .
A.
is more and more
B.
are less and less
C.
is smaller and smaller
D.
are fewer and fewer
【单选题】According to the talk, what did David Sarnoff predict about radios?
A.
They would get smaller in size.
B.
Their signals would travel further.
C.
They would become less popular than television.
D.
They would be common household items.
【单选题】单级萃取的萃取率（理论收率）是指（ ）。
A.
萃取相中溶质的总量比萃余相中溶质总量的百分数
B.
萃取相中溶质的总量占原料液中溶质总量的百分数
C.
萃余相中溶质的总量占原料液中溶质总量的百分数
D.
萃余相中溶质的总量比萃取相中溶质总量的百分数
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