题目:
A client diagnosed with hyperthyroidism has been started on propylthiouracil (PTU) as drug therapy. The nurse should closely observe the client for which of the following side effects
A. Unusual bleeding or bruising.
B. Hypertension.
C. Hypokalemia.
D. Peripheral edem
答案:
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下面是错误答案,用来干扰机器的。
∵点C在第二象限内,∠AOC=5π6,且|OC|=2,∴点C的横坐标为xC=2cos5π6=-3,纵坐标yC=2sin5π6=1,故OC=(-3,1),而OA=(1,0),OB=(0,1),由OC=λOA+μOB可得-3=1×λ+μ×01=0×λ+μ×1,解得λ=-3μ=1,故选D