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问题 单项选择题

使用利尿药后期的降压机制是（）。

A.排Na+利尿，降低血容量

B.降低血浆肾素活性

C.增加血浆肾素活性

D.减少细胞内Na+，降低血管对缩血管物质的反应性

E.抑制醛固酮的分泌

答案

参考答案：D

单项选择题

下列关于信用风险的说法，正确的是( )。

A．信用风险只有当违约实际发生时才会产生

B．对商业银行来说，贷款是唯一的信用风险来源

C．信用风险包括违约风险、结算风险等主要形式

D．交易对手信用评级的下降不属于信用风险
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单项选择题

Uncle Li and Uncle Wang are good friends. They live next to each other and their farms are both at the foot of the mountain. So they can help each other. But neither of them likes to use his head. They’re both poor though they work hard. Most villagers have built new houses, but they still live in the low and broken houses. They never find out why.
Once Uncle Li went to the town to buy some medicine for his wife. In the town he heard apples in a city were expensive. He told Uncle Wang about it as soon as he went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1,000 kilograms of apples in the villages and carried them to the city on a tractor. Bad luck! A lot of apples has already been carried there when they arrived. A few days later they had to sell them at a low price. They felt unhappy and returned to their village.
"I can’t understand why we sustained (蒙受) losses in business while others always profit (盈利)" Uncle Li asked one day.
"The tractor was too small" Uncle Wang said without thinking. "We’ll carry more apples on a truck next time!"
"I agree!" said Uncle Li. "How foolish we were!\

Uncle Li and Uncle Wang live in the low and broken houses because ______.

A．they hope to save money

B．they’re both poor

C．their farms are at the foot of the mountain

D．they’re not far from their farms
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