氧枪氧气压力一般为0.8~1.5MPa,氧枪喷头前的氧压应()这个压力。
A.大于
B.小于
C.等于
D.大于等于
参考答案:D
对炎症性疼痛疗效最好的是()
A、麻醉性镇痛药
B、非甾体抗炎药
C、抗抑郁药
D、糖皮质激素
―____ go out for a picnic with us this afternoon?
―I’d like to, but I’ll be busy preparing for the test.
A.Do you feel like
B.Would you like
C.Why not
D.What about