（）是指人们有能力购买并且愿意购买的某个具体产品的欲望。 A._爱下问搜题

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问题单项选择题

（）是指人们有能力购买并且愿意购买的某个具体产品的欲望。

A.需要

B.欲望

C.需求

D.满意

答案

参考答案：C

完形填空

完形填空。

Li Ming and Joan_ 1 my good 2 . Li Ming 3 from Englandand Joan is 4 China. We 5 in the
same 6 and the 7 class. Li Ming 8 singing and Joan likes singing, _ 9 _ We all 10 very hard.

(      )  1. A.is
(      )  2. A. friend
(      )  3. A.is
(      )  4. A. to
(      )  5. A. are
(      )  6. A. school
(      ) 7. A. some
(      ) 8. A.like
(      )  9. A. also
(      )  10. A. work

B. am
B. friends
B. are
B. come
B. do
B. classes
B. same
B. likes
B. too
B. works

C. are
C. friendes
C. does
C. from
C. be
C. grades
C. different
C. likes to
C. well
C. working

单项选择题

体内缺铁时，最早的表现是（）

A.贮存铁下降

B.血清铁和转铁蛋白饱和度下降

C.正细胞正色素性贫血

D.小细胞低色素性贫血

E.血清总铁结合力增高