轮捕轮放的前提条件是什么？

短文填空。

     Brian was not good at public speaking. One day, he 1_______ (invite) to make a speech at a church. His

2_______ (young) sister, Ann knew he was nervous and tried to calm him down. "Don't worry. Everything

3_______ (be) fine." When the day came, Brian's car had an accident on the way to the church. Luckily, he

was not 4_______ (bad) hurt and arrived at the church on time. It was 5_______ (he) turn. When he stood up,

hit coat became tangled with his chair. After a few 6_______ (minute), he finally began his speech. but he was

so nervous that he dropped his book. Many people thought he would run, but he went on.

     Suddenly, people saw something 7_______ (usual) 8_______ (run) down from his nose, blood! He

stopped 9_______ (speak) when he saw the blood. But he still tried to finish his still tired to finish his speech.

Then Ann quietly moved to the front and handed him her handkerchief. Then she gave him a smile and

10_______ (return) to her seat,

     It was a 11_______ (real) simple gesture, and might be the 12_______ (simple). She just saw someone

in need, and gave him a hand. In the end, Brian finished his talk, with more confidence.

腰麻后去枕平卧6～8小时，是防止术后头痛。

盛华花坛的色彩设计应注意（）等方面。

A、颜色不宜太多

B、色彩对视觉及心理的影响

C、色彩与作用相结合

D、颜色方法适用适当

能增加毛细血管壁通透性的体液因子是

A．心肌抑制因子
B．组胺
C．儿茶酚胺
D．血栓素A2
E．前列环素

下列对结核性脑膜炎脑脊液改变描述正确的是（）

A.外观无色透明或微黄

B.糖及氯化物正常

C.白细胞数通常为（1000~10000）×10⁶/L

D.中性粒细胞显著增高

E.蛋白正常或仅轻度升高