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【单选题】
Under which condition should you tip the bellman?A.
When the bellman stores your bags.
B.
When the bellman carts your bags to your hotel room.
C.
When the bellman carts your bags from the hotel room.
D.
All of the above.
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反馈参考答案：
举一反三
【简答题】Spanning the novels is Cha's great theme, Chinese i___14___。
【简答题】A．He is working hard all the time. B．He is lazy all the time. C．He works hard so as to get his three meals. D．He often has his three meals on time.
【多选题】下列表述中，对波阻抗描述错误的是( )。
A.
波阻抗是前行波电压与反行波电流之比
B.
线路越长，则波阻抗越大
C.
波阻抗耗能
D.
波阻抗是前行波电压与前行波电流之比
【单选题】He is working hard for fear that he __.
A.
should fall behind
B.
fell behind
C.
may fall behind
D.
would fallen behind
【简答题】加里培林认为,心智技能的形成过程包括五个阶段:活动定向阶段、物质活动或物质化活动阶段、有声的言语活动阶段、( )、( )。
【单选题】Because he is working hard, he has been to the position of department manager.
A.
promoted
B.
presented
C.
probably
D.
pleased
【多选题】下列表述中，对波阻抗描述错误的是( )
A.
波阻抗是前行波电压与前行波电流之比
B.
波阻抗是前行波电压与 反 行波电流之比
C.
线路越长，则波阻抗越大
D.
波阻抗耗能
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