根据句意填入合适的词，首字母已给。

1. This is the sun. The sun is h__________.

2. This is s__________. Snow is cold and white.

3. This is w__________. The wind is blowing the leaves.

4. This is a c__________ and r__________. The cloud is a__________. The rain is b__________.

5. Let's c__________ from one t__________ ten.

用单车试验器进行缓解感度试验，120型制动机制动管长度小于16m时，将单车试验器移置（）充气，制动缸压力应能在规定时间内缓解至30kPa以下。

A.1位

B.2位

C.3位

D.4位