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问题 选择题

假如国际市场某商品单价从50美元涨到80美元，不考虑其他因素，该商品价格      ；如果同期人民币对美元的汇率从8：1变为7：1，在不考虑其他因素的前提下，用人民币购买该商品，该商品价格      。           

A．上涨了160％下降了87.5％

B．上涨60％、上涨了40％

C．上涨了62.5％下降了25％

D．上涨了62.5％上涨了60％

答案

答案：B

填空题

Today’’s lecture we’’ll center on the prehistoric people of Nevada Desert. Now most of these prehistoric desert people (36)______the countryside throughout the year. You might think that they’’re wandering aimlessly. Far from it, they actually followed the (37)______of carefully planned moves. Where they moved depended on where food was (38)______. Places where plants were ripening or fish were (39)______. Now often when these people moved, they carried all their (40)______on their backs. But if the journey was long, extra food and tools were sometimes stored in caves or (41)______rocks. One of these caves is now an exciting (42)______ site. Beyond its small opening is a huge underground (43)______. Even though the cave is very large. It was certainly too dark and dusty for the travelers to (44)____________. But it was a great place to (45)____________. And tremendous amounts of food supplies and artifacts have been found there.The food includes dried fish, seeds and nuts. The artifacts include stone spear points and (46)____________. The spear points are actually rather small. Here is a picture of some that were found. You can see their size in relation to the hands holding them.
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单项选择题 A1/A2型题

高铁血红蛋白还原实验参考值 （）

A.高铁血红蛋白还原率≥50%

B.高铁血红蛋白还原率≥55%

C.高铁血红蛋白还原率≥60%

D.高铁血红蛋白还原率≥70%

E.高铁血红蛋白还原率≥75%
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