题目：
·Look at the questions for this part.
·You will hear a passage about "American Weighs In ". You will listen to it twice.
·For questions 24-30, indicate which of the alternatives A, B, or C is the most appropriate response.
·Mark one letter A, B, or C on the Answer Sheet.
Compared to the late 1970s, the percent of children aged 12 to 17 who were overweight in 1994 ______.
A．decreased
B．remained unchanged
C．increased
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C解析： 刺激性气体引起肺水肿的发生主要是由于毛细血管通透性增强引起的。因此尽早、足量、短期应用肾上腺皮质激素，可减少毛细血管的渗出；同时也应限制静脉补液量，脱水、利尿，以减少肺循环血容量...
