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【简答题】
Around Autumn Equinox, farmers all over the country begin to experience sanmang , which means they are extremely busy with harvesting, plowing, and ______.
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举一反三
【单选题】以下不属于关系模型的三个基本要素的是()。
A.
二维表数据结构
B.
关系操作集合
C.
关系完整性约束
D.
笛卡尔积操作
【单选题】Refer to Figure 9-6. Before the tariff is imposed, this country
A.
imports 200 carnations.
B.
imports 400 carnations.
C.
exports 200 carnations.
D.
exports 400 carnations.
【判断题】计算机广域网也就是互联网,也称因特网,它是目前规模最大的计算机网络。
A.
正确
B.
错误
【单选题】Refer to Figure 9-6. The amount of deadweight loss caused by the tariff equals
A.
$100.
B.
$200.
C.
$400.
D.
$500.
【判断题】129计算机广域网也就是互联网,也称因特网,它是目前规模最大的计算机网络。
A.
正确
B.
错误
【判断题】计算机网络也就是互联网,也称因特网,它是目前规模最大的计算机网络。
A.
正确
B.
错误
【单选题】Refer to Figure 9-6. The imposition of a tariff on carnations
A.
increases the number of carnations imported by 100.
B.
increases the number of carnations imported by 200.
C.
decreases the number of carnations imported by 200.
D.
decreases the number of carnations imported by 400.
【单选题】Refer to Figure 9-6. When the tariff is imposed, domestic consumers
A.
lose by $500.
B.
lose by $900.
C.
gain by $500.
D.
gain by $900.
【单选题】Refer to Figure 9-6. When a tariff is imposed in the market, domestic producers
A.
gain by $100.
B.
gain by $200.
C.
gain by $300.
D.
lose by $100.
【单选题】--May I put my bicycle here? -- Yes. But you should always keep it ________, in case it is stolen.
A.
in relief
B.
in sight
C.
in turn
D.
in return
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