1997年中国残联与哪两个部门联合下发了《关于做好盲人保健按摩职业技能培训、鉴定及就业工作的通知》?
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As we know, blood types A and B cannot receive AB, but AB may receive A or B. Type O can give to any other group; hence it is often called the() donor.
A. general
B. popular
C. universal
D. commo
用化验室的器具可以盛装食物,或用烧杯当茶具使用。()
A. 正确
B. 错误
两根材料和截面相同的导线,长度大的一根电阻就一定大。
A. 正确
B. 错误