测量烟度的仪器属于()烟度计。
A、光电化学
B、滤纸式
C、不分光法
参考答案:B
_______ you feel exhausted after the long tiring journey, you may as well take a good rest at home. [ ]
A. So that
B. In that
C. Now that
D. In order that
形成局域冰雪圈的自然原因是()。
A、火山爆发
B、高原隆升
C、小星体撞击
D、太阳辐射变化