【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. [ ]
【单选题】The number of red-crowned cranes is getting ___________.
【单选题】The population of China is _____ than that in Australia. [ ]
【单选题】The number of pandas(熊猫) becoming .
C.
is smaller and smaller
【单选题】(第三章 )若栈采用顺序存储结构,入栈操作时栈顶指针top的变化是( )。
【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
【单选题】(第三章)若栈采用顺序存储结构,出栈操作时栈顶指针top的变化是( )。