【单选题】He states that good qualities such as honesty and self-discipline make ____he is today.
【单选题】Self-contained breathing apparatus is used to ______.
A.
make underwater repairs to barges
B.
determine if the air in a tank is safe for men
C.
enter areas that may contain dangerous fumes or lack oxygen
D.
resuscitate an unconscious person
【单选题】Supermarkets have been moving in the direction of self-service in order to______.
B.
cut down the price of goods sold
D.
make possible a healthier, happier and richer life
【简答题】现病史中主要症状的特点,包括主要症状出现的部位、()、持续时间和程度、缓解或加重的因素。
【判断题】甲醇合成原料气低温甲醇洗脱硫是物理-化学吸收法。