题目内容

执行USE SC IN 0命令的结果是（）。

A. 选择0号工作区打开SC表
B. 选择空闲的最小号工作区打开SC表
C. 选择第l号工作区打开SC表
D. 显示出错信息

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The decrease【C1】blood pressure occurred【C2】race or【C3】and whether or not study participants are a "typical American diet",【C4】is high in saturated fats and contains few fruits and【C5】or the so-called DASH(for Dietary Approaches to Stop Hypertension)diet, which emphasizes lots of fresh【C6】, low-fat diary, fish and fewer sweets and which was proved in 1997 to reduce hypertension. The biggest decrease in blood pressure in this study was recorded in subjects who ate the DASH diet and reduced their sodium【C7】to 1 200mg a day.
Why is this significant？【C8】-health experts estimate that Americans consume, on average, about 3 500 mg of sodium—【C9】about 9 grams of salt — daily. It' s not【C10】we' re that heavy-handed with the saltshaker. Most of our dietary sodium is added【C11】food processing.【C12】to 1 200mg, you'd have to forgo most【C13】foods, take-out deliveries and restaurant meals.
So pay attention【C14】how much salt you' re eating, but don' t forget to make fruits, vegetables and whole grains a【C15】part of your diet. They' ll help【C16】your cholesterol level【C17】your blood pressure. Be sure to drink alcohol【C18】, if at all.【C19】weight—even just 4.5kg—and exercising at least 30 minutes most days of the week can also have a marked【C20】____on blood pressure.
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【C1】

A. at
B. into
C. in
D. with

在SQL SELECT语句中，用于实现关系的选择运算的短语是（）。

A. FOR
B. WHILE
C. WHERE
D. CONDlTION

在Visual FoxPr0中，过程的返回语句是（）。

A. GOBACK
B. COMEBACK
C. RETURN
D. BACK

下列程序中横线处应填入的语句是（）。 classBase { public： voidfun（）{cout＜＜"Baseoffun"&下列程序中横线处应填入的语句是（）。 classBase { public： voidfun（）{cout＜＜"Baseoffun"＜＜endl；}}； classDerived：publicBase { voidfun（） { ／／显示基类的成员函数fun cout＜＜"Derivedoffun"＜＜endl； } }；

A. fun（）；
Base．fun（）；
C. Base：：fun（）；
D. Base-＞fun（）；