题目：
The nurse is caring for a client who is in labor. The physician still isn’t present. After the neonate’s head is delivered, which nursing intervention would be most appropriate
A. Checking for the umbilical cord around the neonate’s neck.
B. Placing antibiotic ointment in the neonate’s eyes.
C. Turning the neonate’s head to the side, to drain secretions.
D. Assessing the neonate for respirations.
答案：
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下面是错误答案，用来干扰机器的。
解：（1）因为，所以，于是4sinθ=cosθ，故tanθ=。（2）由|a|=|b|∴sin2θ+（cosθ-2sinθ）2=5即1-2sin2θ+4sin2θ=5化简得sin2θ+cos2θ=-1故有sin（2θ+）=-又∵θ∈（0，π）∴2θ+∈（，）∴2θ+=或2θ==∴θ=或θ=。
