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问题 单项选择题

比较某湖水四季的氯化物含量有无差别，宜用

A．样本均数与总体均数比较的t检验
B．配对计量资料比较的t检验
C．两样本均数比较的t检验
D．两大样本均数比较的u检验
E．完全随机设计资料的方差分析

答案

参考答案：E

填空题



If you find you spend more than you make, there are only two things to do: decrease your spending or (1) . It’s often easiest to decrease expenditures, because your expenses tend to be more (2) . There are as many ways to (3) as there are people looking to save it. For example, you may pool your resources with friends, or (4) only during sales, or even live more simply. But (5) that saving money should not necessarily be an end in itself. Don’t (6) of ways to save a dime, and don’t get upset about situations where (7) to spend money. The goal is to bring your budget into balance, not to become a tightwad who keeps (8) of every penny and feels that spending money is a (9) . It is important to remember that budgets may be (10) not only by decreasing expenditures, but also by increasing income. (11) to increase income is to get a (12) if you don’t already have one.
Many students work during college. Although working adds to the (13) you will face, it does not mean that your grades will necessarily suffer. In fact, many students who work (14) than those who don’t work, because those with jobs need to be (15) . Considering part-time work is often a better (16) for dealing with budget shortfalls, than taking out a loan. Because student loans are (17) , it’s easy to use them as a crutch. Loans can be of help (18) or if you couldn’t afford to attend a college without them. If you do (19) , remind yourself: one day soon you’ll have to (20) with interest.
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单项选择题 A1/A2型题

下列选项中关于腹膜叙述错误的是（）

A.腹膜分为壁腹膜和脏腹膜两部分

B.壁腹膜贴附于腹壁、横膈脏面和盆壁的内面

C.脏腹膜覆盖于内脏表面

D.腹膜是一层光滑的浆膜，有许多皱襞

E.所有腹内脏器表面均无腹膜覆盖
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