问题 单项选择题

关于甲状腺功能减退症患者发生贫血的原因,下列说法不正确的是()

A.甲状腺激素缺乏引起血红蛋白合成障碍 

B.甲状腺激素缺乏引起血红蛋白破坏增多 

C.肠道吸收铁障碍引起铁缺乏 

D.肠道吸收叶酸障碍引起叶酸缺乏 

E.恶性贫血 

答案

参考答案:B

单项选择题
单项选择题

Congress makes the laws in the United States. It has two parts, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one.
The House and Senate are divided into small groups which take care of special matters such as education or foreign affairs. The most important work of Congress is often done in these groups, which are called subcommittees.
According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president.

Which of the following is true

A. A representative serves for two years.
B. To become a senator is easier than to become a representative.
C. A senator performs his duties for a shorter time than a representative.
D. All presidents were representatives and then senators before becoming president of theUnited States.