二级中误差公式为()。
A.0.02+0.0006S
B.0.01+0.0003S
C.0.02+0.001S
D.0.04+0.003S
参考答案:C
—The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job
— () my students have a try
A. Shall
B. Must
C. Will
D. May
肱骨中1/3骨折,近端向外、向前,远端向上移位,是由于受何牵拉所致()。
A.胸大肌
B.三角肌和喙肱肌
C.肱三头肌和肱二头肌
D.肱肌
E.背阔肌