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【单选题】
只有满足联接条件的记录才包含在查询结果中，这种联接为______。A.
左联接
B.
右联接
C.
内部联接
D.
完全联接
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反馈参考答案：
举一反三
【单选题】What is the output of the following program? int f(int n) { return (n-1); } int main() { int i,j=0; for(i=1;i<3;i++) j+=f(i); printf("%d\n",j); }
A.
4
B.
3
C.
2
D.
1
【简答题】听力原文：F：What do you think is the cause of the output reduction in summer? M：Well，due to high replacement rate and low efficiency from fill-in workers，we just don't make as many bicycle frames as we do ...
【单选题】What is the cause of the Syslog output messages?
A.
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B.
The EIGRP neighbor on Fa0/1 went down due to a failed link.
C.
The EIGRP neighbor connected to Fa0/1 is participating in a different EIGRP process, causing the adjacency to go down.
D.
A shut command was executed on interface Fa0/1, causing the EIGRP adjacency to go down.
E.
Interface Fa0/1 has become error disabled, causing the EIGRP adjacency to go down.
【单选题】菌种的选择对发酵剂的质量起着重要作用,应根据生产目的不同选择适当的菌种。选择发酵剂应不考虑的是:( )
A.
产酸能力和后酸化作用
B.
脂肪的水解性
C.
粘性物质的产生
D.
滋气味和芳香味的产生
【单选题】A competitive firm's production function is f(x 1 , x 2 ) = 4x 1 1/2 + 6x 2 1/2 . The price of factor 1 is 1 and the price of factor 2 is 2. The price of output is 4. What is the pro fi t-maximizing q...
A.
68
B.
136
C.
64
D.
148
E.
56
【单选题】下列关于青霉素引起超敏反应的描述哪项是错误的
A.
可引起 Ⅰ 、 Ⅱ 、 Ⅲ 或 Ⅳ 型超敏反应
B.
皮试阳性者可采用脱敏注射
C.
初次注射也可引起过敏反应
D.
个体差异明显
E.
青霉噻唑和青霉烯酸为半抗原
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