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【单选题】
卡托普利主要通过哪项作用产生降压效应A.
利尿降压
B.
血管扩张
C.
ACE抑制
D.
α受体阻断
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【简答题】If you are planning to spend your holidays in Yellowstone National Park in summer, what should you take with you?
【简答题】Which of the following best describes Yellowstone's weather?
【单选题】E Most of the Yellowstone National Park is above 2,275 meters. Yellowstone' s weather is very changeable. In summer, it may be warm and sunny with temperatures in the high 70s. At night in any given m...
A.
sunny warm day may become very stormy with wind, rain and sometimes snow. Without enough clothing and equipment, an easy day-hike or boat-trip can turn into a battle against nature. 72. The campers or hikers are advised to________ [ A] fight against stormy weather [
B.
] stay in a camp at night-time [
C.
] get familiar with the area around [
D.
] prepare for changeable weather
【单选题】Visitors to Yellowstone Park ______ consider their impact on the natural environment, leaving behind litter and other damage.
A.
nearly
B.
seldom
C.
ever
D.
yet
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