问几道prep的逻辑题

miguel29

1，Most household appliances use electricity only when in use.Many microwave ovens, however, have built-in clocks and so use some electricity even when they are not in use.The clocks each consume about 45 kilowatt-hours per year.Therefore, households whose microwave oven has no built-in clock use 45 kilowatt-hours per year less, on average, than do comparable households whose microwave oven is otherwise similar but has a built-in clock.



Which of the following is an assumption on which the argument depends?



(A) Households that do not have a microwave oven use less energy per year, on average, than do households that have a microwave oven.

(B) Microwave ovens with a built-in clock do not generally cost more to buy than microwave ovens without a built-in clock.

(C) All households that have a microwave oven also have either a gas oven or a conventional electric oven.

(D) Households whose microwave oven does not have a built-in clock are no more likely to have a separate electric clock plugged in than households whose microwave oven has one.

(E) There are more households that have a microwave oven with a built-in clock than there are households that have a microwave oven without a built-in clock 选D

2，With a record number of new companies starting up in Derderia and with previously established companies adding many jobs, a record number of new jobs were created last year in the Derderian economy.This year, previously established companies will not be adding as many new jobs overall as such companies added last year.Therefore, unless a record number of companies start up this year, Derderia will not break its record for new jobs created.



Which of the following is an assumption on which the argument relies?



(A) Each year, new companies starting up create more new jobs overall than do previously established companies.

(B) Companies established last year will not add a greater number of jobs overall this year than they did last year.

(C) This year, the new companies starting up will not provide substantially more jobs per company than did new companies last year.

(D) This year, the overall number of jobs created by previously established companies will be less than the overall number of jobs lost at those companies.

(E) The number of jobs created in the Derderian economy last year was substantially larger than the number of jobs lost last year. 选C

帮我解答一下吧，谢谢啦

zhangjy

Question1
结论：没有build in clock 的微波炉的家庭比有build in clock的家庭每年要节约用电45 kilowatt-hours， 但是前提必须是这些没有Build in clock的家庭不额外买clock用， 因为如果他们额外买clock用得话，就不能得出结论他们能节约45 kilowatt-hours per year了。

miguel29

了解了，谢谢，继续等第二提

泥鳅bao

第一个什么答案？是D么？