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问题 单项选择题

有关二尖瓣狭窄的早期病理生理改变，下列哪项不正确（）

A.左房压升高

B.肺静脉压升高

C.肺毛细血管楔压升高

D.低心排血量

E.肺淤血征象

答案

参考答案：D

解析：二尖瓣狭窄血流梗阻明显时，左房压升高，肺静脉淤血，肺毛细血管楔压升高，晚期至心功能严重受损时，才会出现明显心排血量减低。

解答题

下表为探究“口腔内的化学性消化”的实验记录表

试管加入的物质（各2毫升）温度试剂实验现象
1号淀粉+唾液0℃碘液
2号淀粉+唾液80℃碘液
3号淀粉+唾液37℃碘液
4号淀粉+清水37℃碘液
（1）请在表内填写实验现象（请填写字母）：________A．变蓝 B．不变蓝

（2）1、2号试管的实验现象说明______．

（3）3号试管出现的现象是因为唾液里的______ 将淀粉分解成了麦芽糖．

（4）4号的对照实验是______号试管．
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单项选择题

Future Computer Trends:
The components of a PC will be built into the (6) and large plasma or electroluminescent flat panel display hanging on a partition wall will act as both a (7) and videophone display.

A. desk B. monitor C. built D. mouse-driven

A high resolution, touch sensitive LCD (8) into desktop will allow pan-based pointing and data input. In the home, meanwhile, computers will become as ubiquitous as TVs.
Computer interfaces will be far friendlier than (9) graphical user interfaces (GUI) of today. Computers will use "human interfaces" based on multimedia.
RISC microprocessors will finally obliterate the ever thinning gap between workstations and PCs. Similar advances in nonvolatile flash memory will lead to the replacement of magnetic (10) disks with electronic "silicon disks".
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