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【单选题】
有一真空钢筒，将阀门打开时，大气（视为理想气体）冲入瓶内，此时瓶内气体的温度将A.
不变
B.
升高
C.
降低
D.
无法判定
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反馈参考答案：
举一反三
【单选题】在功能上属咀嚼黏膜，但又有被覆黏膜的特点。最主要的是其表面有许多不同类型的乳头，此属于以上哪种结构（）
A.
咀嚼黏膜
B.
梅克尔细胞
C.
特殊黏膜
D.
黏膜下层
E.
固有层
【单选题】Which of the following is NOT true about absolute advantage?
A.
According to Adam Smith, a country may also produce goods at home that it can buy at a lower cost from other countries.
B.
That a country has an absolute advantage in the production of a product means a commodity will be produced in the country where it costs least.
C.
According to Adam Smith, countries should specialize in the production of goods and then trade these for goods produced by other countries.
D.
A country has an absolute advantage in the production of a product when it is more efficient than any other country in producing it.
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