— Look, the old man is walking slowly in the middle of the street. It’s too dangerous.

— You’re right. Let’s go and help him go ______ the street.

A．across

B．through

C．over

D．along

脾肿大最显著的疾病是______

A．急性粒细胞白血病

B．急性淋巴细胞白血病

C．急性单核细胞白血病

D．慢性粒细胞白血病

E．慢性淋巴细胞白血病