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【单选题】
用于存放数据库数据的基本对象是( )。A.
表
B.
查询
C.
窗体
D.
报表
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反馈参考答案：
举一反三
【单选题】Which is the structure of the following argument? “Joe is not a prison guard, since he is a former felon, and former felons are not allowed to become prison guards”
A.
linear
B.
branching
C.
joint
D.
a combination of more than one of these structures
【单选题】有关社会学发展的两个方向,以下说法中正确的是
A.
一是走向伦理学，二是走向物理学
B.
一是走向哲学，二是走向心理学
C.
一是走向宏观社区分析，二是走向微观行为分析
D.
一是走向与人类学的融合，二是走向与人类学的分离
【单选题】肿瘤疫苗与传统疫苗的主要区别是
A.
肿瘤疫苗主要用于肿瘤的预防
B.
传统疫苗主要用于疾病的治疗
C.
肿瘤疫苗主要用于肿瘤的治疗
D.
肿瘤疫苗是免疫重建疗法
E.
肿瘤疫苗是人工被动免疫疗法
【单选题】Joe likes to sleep late in the mornings and play tennis in the afternoons. The opportunity cost of Joe attending his morning class for one hour is
A.
an hour of tennis given up.
B.
an hour of sleep given up.
C.
both the tennis given up and the sleep given up.
D.
nothing because he is paying for his class.
【单选题】Joe's budget constraint equals 500 = 2F + 100S, where $500 is Joe's income, $2 is the price of food (F) and $100 is the price of shelter (S). How much food can Joe buy if he buys one unit of shelter?
A.
2 units
B.
200 units
C.
250 units
D.
400 units
【简答题】嘴松、不严实 钱不够 请客
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