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【单选题】
流水别墅的设计师是谁?A.
赖特
B.
弗兰克，
C.
扎哈
D.
密斯，凡德罗
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【单选题】CA6140车床 主轴电动机和冷却泵电动机的启动和停止顺序,要求 ( ) 。
A.
主轴电动机停止后，冷却泵电动机才能停止
B.
冷却泵电动机启动后，主轴电动机才能启动
C.
主轴电动机和冷却泵电动机同时启动
D.
当主轴电动机停止时，冷却泵电动机也停止
【单选题】CA6140车床主轴电动机和冷却泵电动机的启动和停止顺序，要求 。
A.
当主轴电动机停止时，冷却泵电动机也停止
B.
冷却泵电动机启动后，主轴电动机才能启动
C.
主轴电动机和冷却泵电动机同时启动
D.
主轴电动机停止后，冷却泵电动机才能停止
【单选题】What doesthe professor say about vocabulary in one’s native language?
A.
It is totally useless to have very large passive vocabulary.
B.
Our passive vocabulary is larger than our active vocabulary.
C.
There are thousands of words we don’t understand at all.
D.
We need to guess the meaning of many difficult words.
【单选题】Which is correct about the Iceberg Theory? ( )
A.
Iceberg Theory refers to two eighth of an iceberg is above the water, the rest is underneath the water.
B.
The Iceberg Theory is not only used in writing, it has been applied in various fields.
C.
Iceberg Theory is popular because of Hemingway.
D.
Hemingway’s style is only famous for his Iceberg Theory.
【简答题】How can we account for the formation of an iceberg?
【简答题】边际分析定价法，是指基于微分极值原理，通过分析不同价格与销售量组合下的产品边际收入、边际成本和边际利间的关系，进行定价决策的一种定量分析方法。当边际利润最大时，利润达到最大值，此时的价格就是最优销售价格。（ ）
【单选题】One's recognition vocabulary is ______.
A.
less often used than his active vocabulary
B.
smaller than his active vocabulary
C.
as large as his active vocabulary
D.
much larger than his active vocabulary
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