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【单选题】
对心绞痛和高血压均有效的药物是（）A.
普萘洛尔
B.
硝酸甘油
C.
肼屈嗪
D.
利血平
E.
卡托普利
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反馈参考答案：
举一反三
【单选题】Scarcity exists because
A.
society and people are greedy and wasteful.
B.
our wants exceed the resources available to satisfy them.
C.
of the inefficient choices we make.
D.
poor people need more food and other goods.
【简答题】下列有关主观判断法的说法正确的有（ ）。
【简答题】下列有关作业成本法的说法正确的有（ ）。
【单选题】Peter: ________ has he lived in China?Susan: He has lived here for two years.
A.
How long
B.
How soon
C.
How much
【单选题】如下内容,哪些属于计数资料( )。
A.
实验结果：身高 163cm ，体重 50kg
B.
实验结果：细菌菌落消毒前 508cfu/m 3 ，消毒后 400cfu/m 3
C.
实验结果：体温 32°C ， BP110/90mmg
D.
实验结果：显效、有效、无效
E.
实验结果：用数字表示的资料
【单选题】Late-night Drinking Coffee lovers beware. Having a quick 'pick-me-up' cup of coffee late in the day will play havoc with your sleep. As well as being a stimulant, caffeine interrupts the flow of melat...
A.
melatonin levels need to be raised.
B.
neurohormone can wake us up.
C.
coffee is a stimulant.
D.
decaf is a caffeinated coffee.
【单选题】Scarcity exists because of:
A.
the allocation of goods by prices.
B.
specialization and division of labor.
C.
the market mechanism.
D.
unlimited wants and limited resources.
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