根据句意及首字母提示填空。

1. Wait a moment, please! I have to t____ my shoes.

2. S____ wear green uniforms to help them hide in the forest.

3. All the airline p____ should wear uniforms on the plane.

4. Because of bad weather at the a____ now, we can't get on the plane on time.

5. All the police o____ in the police station used to have a regular meeting once a week.

对血脑屏障的叙述正确的是()

A．血—脑脊液屏障是脑表面的动脉与脑脊液之间的屏障

B．维持脑血管压力的稳定

C．维持脑脊液成分的稳定

D．维持神经元微环境的稳定

E．血—脑屏障是血液与脑表面之间的屏障