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【单选题】
地高辛治疗心房颤动的主要机制是A.
抑制窦房结的自律性
B.
延长心房有效不应期
C.
降低心房异位节律点的自律性
D.
减慢房室传导
E.
降低普肯耶纤维自律性
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举一反三
【简答题】How many supporting details are given in the sample essay?_________
【单选题】Which of the following questions might the sample essay we have just heard answer?
A.
Recount a time when you faced a challenge, setback, or failure. How did it affect you, and what did you learn from the experience?
B.
Why do you want to attend this school?
C.
/
D.
/
【简答题】控制测量分为平面控制测量和（）控制测量两部分。
【单选题】In which of the following sentences, the word "shuttle" means the same with the one in the sample essay?
A.
The rising volume of trade – more goods and services shuttling in and out of the United States – is good news for many sectors.
B.
The shuttle run is an exercise in which the participant runs back and forth between two points, sometimes moving blocks or other objects from one point to the other, as fast as possible.
C.
With mass transportation suspended during the lockdown, Vice President Leni Robredo's office is offering free shuttle services for health workers starting March 18, 2020.
D.
The shuttle, which cost around $450 million per mission, was supposed to fly once a month but never got close to its goal.
【简答题】Find words/phrases in the sample essay with similar meaning to the expressions below.
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