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问题 选择题
双曲线
x2
4
-
y2
2
=1的焦点坐标是（　　）
A．（-6，0），（6，0）B．(-
6
，0)，(
6
，0)		C．（-2，0），（2，0）D．(-
2
，0)，(
2
，0)
答案

因为双曲线

x2
4
-
y2
2
=1，可知焦点在X轴上，a=2，b=
2
，所以c2=4+2=6，

所以双曲线

x2
4
-
y2
2
=1的焦点坐标是(-
6
，0)，(
6
，0)．

故选B．

单项选择题

People are indulging in an illusion whenever they find themselves explaining at a cocktail(鸡尾酒)party，say, that the are “in computers，”or“ in telecommunications，”or “in electronic funds transfer”. The implication is that they are part of the high-tech world. Just between us，they usually aren’t. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are （71）of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working group（紧密联系在一起的工作小组），we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort，and our failures stem from poor human interactions.

The main reason we tend to focus on the（72）rather than the human side of work is not because it’s more (73)，but because it’s easier to do. Getting the new disk drive installed is positively trivial compared to figurine out why Horace is in a blue funk(恐惧）or why Susan is dissatisfied with the company aver only a few months. Human interactions are complicated and never very crisp（干脆的，干净利落的）and clean in　their effects, but they matter more than any other aspect of the work. If you find yourself concentrating on the（74）rather than the（75）．you’re like the vaudeville character （杂耍人物）who loses his Keys on a dark street and looks for them on the adjacent street because，as he explains，“The light is better there!”

（75）处填（）。

A．technology　

B．sociology　

C．physiology　

D．astronomy
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单项选择题 A1/A2型题

对于淋病，哪项恰当（）

A.急性下生殖道感染的首要症状是急性宫颈炎

B.60%～80%感染后无症状，易被忽略

C.成人淋病的80%由性接触传播

D.可通过血行传播，引起弥漫性腹膜炎

E.分泌物培养阳性，方可确诊
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