12、Because of high demand for Type AB blood, supplies of it in blood banks are usually limited.
A.the; the B.a; the C.不填; the D.不填; 不填
科目:高中英语 来源: 题型:
Because of high demand for Type AB blood, supplies of it in blood banks are usually limited.
A.the; the B.a; the C.不填; the D.不填; 不填
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