关于顶轴油泵叙述正确的有（）。A、联锁投入，汽机转速小于1200rpm时，联启投备泵

在消化道内，消化脂肪的部位是（　　）

A．口腔

B．小肠

C．胃

D．大肠

雷丸中驱绦虫的有效成分是（）。.

Currently 94% of Web users use either Internet Explorer or Firefox, but recently some new (71) have been developed that are beginning to attract attention. The browser Opera is becoming very (72) because of its speed, it is currently the world’s fastest browser, and because it is much smaller (73) existing browsers (it can almost fit on a single diskette). It can also (74) the last Web page you visited, so the next time you surf, you can start where you left off. And like the big two, you can get it for free; the catch is that you have to watch blinking ads in one comer, or pay ＄40 for the ad-free (75) of Opera.

A．readers

B．machines

C．techniques

D．browsers

门静脉高血压症的主要临床表现有（）。

A．脾肿大

B．侧支循环的建立

C．黄疸

D．腹水

E．贫血

构成血栓头部的主要成分是()

A．血小板

B．红细胞

C．中性粒细胞

D．纤维蛋白

E．单核细胞