再生障碍性贫血的主要原因是
A．造血原料缺乏B．红细胞内在缺陷C．红细胞破坏过多D．骨髓造血功能衰竭E．红细胞寿命缩短
参考答案：D
农信社信贷准入对象主要包括哪些？
An ABC dry chemical fire extinguisher would be LEAST effective against a fire in（）.
A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can
