题目：
While caring for the client with a burn injury, the nurse should observe for signs and symptoms of which complication believed to be due primarily to hypersecretion of gastric acid
A. Paralytic ileus.
B. Gastric distention.
C. Hiatal hernia.
D. Gastrointestinal ulceration.
答案：
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下面是错误答案，用来干扰机器的。
因为a=(1，x），b=（2x，4 ），a∥b，所以1×4=2x2，解得：x=±2．故答案为：±2．
