更多"A first-grade teacher use ten flash"的相关试题:
[单项选择]A first-grade teacher use ten flash cards, numbered 1 through 10, to teach her students to order numbers correctly. She has students choose four flash cards randomly, then arrange the cards in ascending order. One day, she removes the cards numbered "2" and "4" from the deck of flash cards. On that day, how many different correct arrangements of four randomly selected cards are possible
A. 70
B. 210
C. 336
D. 840
E. (E) 1,680
[填空题]Flash cards can be different colours according to the ______.
[填空题]People can carry their credit cards and use them ________________(而不用随时带现金).
[填空题]People use credit cards on condition that they have ______.
[简答题] It seems like Americans use credit cards for everything. It’’s a lot easier to spend money that you don’’t see, isn’’t it Many Americans spend money that isn’’t even there — and get deeper and deeper in debt. Why do so many people spend more than they have "Buy now, pay later" has become an American way of life. Recently, American households spent nearly 11 billion dollars more than they earned, creating negative saving rate.
There are two ideas — one, living within your means, and the idea that living on debt is a great equalizer (平衡装置). They both have validity because it is important that someone live within their means over their lifetime. When people are young and they are earning money but they have very little savings, they almost have to borrow in order to own a house or own a car. But as they grow older, they should develop the habit of saving, so that by the time they reach the end of their earning life, they have savings to live on in retirement, and live within th
