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李女士，56岁，糖尿病，同时患肺炎球菌性肺炎，住院治疗。医嘱：胰岛素8单位饭前30mm皮下注射；青霉素800万U静脉滴注，每日1次（用5日）；喷托维林（咳必清）25mg口服，每日3次。

小王为李女士静脉穿刺时，不妥的操作是（）。

A.选择手臂静脉

B.在穿刺点上方6cm处扎止血带

C.针头与皮肤呈20度（角）

D.从静脉侧面进针

E.见回血立刻注药

答案

参考答案：E

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.
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问答题 简答题

根据流体传热方式换热器可分为哪几种？
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