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问题 填空题

函数y=8x2-lnx的单调减区间是______，极小值是______．

答案

因为y=f（x）=8x2-lnx，

∴f'（x）=16x-

1
x
=
16x2-1
x
=
16(x-
1
4
)(x+
1
4
)
x

∵x＞0

∴当x＞

1
4
时，f'（x）＞0，即f（x）递增；

当0＜x＜

1
4
时，f'（x）＜0，f（x）递减．

且f（x） 极小值为f（

1
4
）=8×(
1
4
)2-ln
1
4
=
1
2
+2ln2．

故答案为：（0，

1
4
），
1
2
+2ln2．

单项选择题 A1/A2型题

患者女性，18岁，左上后牙遇冷水痛2周，咬物不用此侧已3个月。查：龋洞深达牙本质中层，叩诊（－）。冷水入洞痛，冷测同对照牙。该患牙诊断是（）

A.中龋

B.深龋

C.慢性牙髓炎

D.可复性牙髓炎

E.牙本质过敏症
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单项选择题

The primary advantages of a Client/Server system arise from splitting the processing between the client system and the database server. Since the bulk of the database processing is done on the back-end, the speed of the DBMS isn’t tied to the speed of the (31) .

The major disadvantage of Client/Server system is the increased cost of (32) and support personnel who maintain the database server. There is also the issue of (33) with so many parts comprising the entire C/S system; Murphy’s Law can kick in-the more pieces that compose the system, the more pieces that can fail. It’s also harder to track down problems when the system (34) . And it can initially take longer to get all the components set up and working together. All this is compounded by the general lack of experience and expertise of potential support personnel and programmers, due to the relative newness of the technology. As C/S system become more common, this problem should abate.

Therefore the C/S system is more (35) .

（33）是（）

A. complexity

B. possibility

C. simplicity

D. variety
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