具有解热、镇痛、抗炎、抗风湿的作用,对慢性疼痛有较好的镇痛效果的是()
A.激素
B.脊髓刺激
C.深部脑刺激
D.麻醉性镇痛药
E.非类固醇抗炎药
参考答案:E
---- When did you last hear _____Jay?
---- He phoned me this morning, and we agreed _____ a time and place to meet.
A.of; to
B. about; with
C. from; with
D.from; on
列出气动仪表常用的元件与组件,并说明它们的作用。