PAS染色时红系呈阳性()
A.红白血病
B.缺铁性贫血
C.毛细胞性白血病
D.急性淋巴细胞白血病
E.急性单核细胞白血病
参考答案:A
______ earthquake on March 11th was ______ terrible disaster, making thousands of Japanese homeless.
A.An; a
B.The; a
C.An; the
D.The; the
接地电阻包括接地导线的电阻、接地体本身的电阻、接地体与大地间的()电阻和大地电阻四部分。