遗传研究表明,类风湿性关节炎属于()
A.单基因遗传
B.隐性遗传
C.非遗传性疾病
D.显性遗传
E.多基因遗传
参考答案:E
— Could you help me, Mr Black?
— _____________[ ]
A. Certainly.
B. Thanks.
C. OK.
D. You're welcome.
对于0.01级~0.1级的检定装置,采用瓦秒法时要求负载功率稳定度应不超过装置准确度等级的()。
A.2/3~1/2
B.1/6~1/5
C.1/2~1/5
D.1/3~2/3