w**********d
发帖数: 155 | 1 certain instruments used in veterinary surgery can be made either of
stainless steel or of nylon. in a study of such instruments, 50 complete
sterilization of a set of nylon instruments required 3.4 times the amount of
energy used to manufacture that set of instruments, whereas 50 complete
sterilization of a set of steel instruments required 2.1 times the amount of
energy required to manufacture that set of instruments.
Fi the statements above are true, each ofthe following could be true EXCEPT: |
c**d
发帖数: 3888 | 2 2 is the only answer choice that cannot possibly be true. |
w**********d
发帖数: 155 | 3 钻牛角尖，糊涂了。原题讲到消毒消耗的能量是制造的3.4倍。2说的是对尼龙器械消毒
比制造这个尼龙器械耗费更多的能量。怎么是错的？ |
D**********s
发帖数: 320 | 4 2. cannot be true.
50 complete sterilization = 3.4 times manufacture cost of one set
1 complete sterilization = 3.4/50 < 1 times manufacture cost of one set.
If one complete sterilization of a set costs more energy than manufacturing
that set, then 50 complete sterilization should cost more than 50 times the
amount of energy used to manufacture that set.
of
of
EXCEPT:
energy
【在 w**********d 的大作中提到】
: certain instruments used in veterinary surgery can be made either of
: stainless steel or of nylon. in a study of such instruments, 50 complete
: sterilization of a set of nylon instruments required 3.4 times the amount of
: energy used to manufacture that set of instruments, whereas 50 complete
: sterilization of a set of steel instruments required 2.1 times the amount of
: energy required to manufacture that set of instruments.
: Fi the statements above are true, each ofthe following could be true EXCEPT:
|
w**********d
发帖数: 155 | 5 明白了。一直给读成50套器械的消毒对50套器械的制造。我这个错误够弱的。多谢！ |
c**d
发帖数: 3888 | 6 Yes... read your questions carefully. A tiny mistake can be fatal. |
