[計量] 請問兩題PP計量
110.
If z^n = 1, what is the value of z ?
(A) n is a nonzero integer.
(B) z > 0
答案A
(A)成立的話 Z不就有兩個值了嗎(1或-1)
我本來選(c) 這樣z=1
116.
An insurance company has a contract with a medical laboratory to pay
a discounted price for a certain medical test performed on patients
referred to the laboratory by the insurance company.
If the laboratory's original bill for this medical test on a patient
referred by the insurance company is $230, what is the percent discount
specified by the contract between the laboratory and the insurance company?
(1) The insurance company is required to pay only 20 percent of the original
bill for the test.
(2) The insurance company is required to pay $46 for the test.
答案D
看不太懂題目在說啥^^"
謝謝唷
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