All of the following statements are true EXCEPT ______.
A. young people couldn't afford their own tuition in the 1970's
B. it's difficult for graduates from colleges to find a job in the 1970's
C. fewer parents could afford to send their children to college because of the recession in 1970's
D. birthrate dropped in the 1970's because of the recession
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In the U.S., the expression that thin is "in" and fat is "out" probably means ______.
A. thin is "diligent" and fat is "lazy"
B. thin is "fashionable" and fat is "unfashionable"
C. thin is "inside" and fat is "outside"
D. thin is "spiritless" and fat is "vigorous"
American cars were not popular in their domestic markets because they were ______.
A. small
B. gas consuming
C. fuel efficient
D. not attractive
艾森克认为，性格差异除表现为内外倾以外，还有稳定性和()性。
A. 敏捷
B. 直觉
C. 求实
D. 独立
在SQL Server 2000中，有商品表(商品号，商品名，单价)和销售表(商品号，销售时间，销售价格)。现要限制“销售价格”的取值必须在此商品“单价”的0.6倍到1.5倍范围之内，实现这个约束的正确代码是______。
A. CHECK(销售价格BETWEEN单价*0.6 AND单价*1.5)
B. CHECK(销售价格BETWEEN商品表.单价*0.6 AND商品表.单价*1.5)
CREATE TRIGGER tri_Sales ON销售表FOR INSERT，UPDATE AS IF EXISTS(SELECT*FROM INSERTED a JOIN商品表b ON a.商品号=b.商品号 WHERE销售价格NOT BETWEEN单价*0.6 AND单价*1.5) ROLLBACK
D. CREATE TRIGGER tri_Sales ON销售表INSTEAD OF INSERT，UPDATE AS IF EXISTS(SELECT*FROM INSERTED a JOIN商品表b ON a.商品号=b.商品号 WHERE销售价格NOT BETWEEN单价*0.6 AND单价*1.5) ROLLBACK
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