【单选题】SCENARIO 3.2: Lettuce and spinach are substitutes. Lettuce and tomatoes are complements. Lettuce is a normal good. During the winter, about 20% of the lettuce crop was destroyed by flooding. Refer to ...
A.
an excess demand for lettuce.
B.
a decrease in the supply of lettuce.
C.
an increase in the demand for lettuce.
D.
an excess supply of lettuce.
【单选题】SCENARIO 3.2: Lettuce and spinach are substitutes. Lettuce and tomatoes are complements. Lettuce is a normal good. During the winter, about 20% of the lettuce crop was destroyed by flooding. Refer to ...
【判断题】OFDM技术是一种多载波调制技术,也是一种正交的频分复用(FDM)技术。
【单选题】Which of the following statements is true about the impact of an increase in the price of lettuce(生菜)?
A.
The demand for lettuce will decrease.
B.
The supply of lettuce will decrease.
C.
The equilibrium price and quantity of salad dressing(沙拉酱) will rise.
D.
The equilibrium price and quantity of salad dressing will fall.
E.
Both a and d are true.
【单选题】两侧肩胛骨下角的连线平对第几胸椎棘突? ( )
【单选题】“The lettuce was lonely without tomatoes and cucumbers for company”is an example of
【判断题】OFDM技术是一种多载波调制技术,也是一种正交的频分复用(FDM)技术。
【单选题】【 3-1-9 】 设一个循环队列 Q[maxSize] 的队头指针为 front ,队尾指针为 rear ,队列最大容量为 maxSize ,除此之外该队列再没有其他数据成员,则该队列的队满条件是( )。 A . Q.front==Q.rear B . Q.front+Q.rear>=maxSize C . Q.front=...
C.
选 C 。既然不能附加任何其他数据成员,只能采用牺牲一个队列元素的整除取余的方式来区分队空和队满的条件。因此,选项 C 是合适的。选项 A 是判断队列是否空的条件,选项 B 和选项 D 都是干扰项。
【单选题】5mol氯化钠溶于水配成500毫升溶液,其浓度为