【单选题】The pioneers ahead of the main body of troops throw some lightweight, dark colored objests to ______.
A.
cross completely snow-covered landscape
B.
prevent themselves from suffering snow-blindness
C.
let the men behind them see something
D.
warm themselves in the cold
【单选题】锅炉管道选用钢材主要根据在金属使用中的()来确定。
【简答题】a dark-colored dress
【简答题】暗色矿物 (Dark-colored mineral)
【判断题】胃癌的常见并发症有出血、幽门或贲门梗阻、穿孔。
【单选题】Vitamin D deficiency will probably result in
【单选题】Experts advises to ______ in hot weather.
A.
wear dark colored clothes