为预防或治疗中枢神经系统白血病,可用作鞘内注射的化学治疗药物是()
A.柔红霉素
B.阿糖胞苷
C.环磷酰胺
D.甲氨蝶呤
E.6-巯基嘌呤
参考答案:B, D
和15相邻的两个数是[ ]
A.15,16
B.16,17
C.14,15
D.14,16
—I want to tell you something.
—You what? I can't hear you're saying.
A.why
B.what
C.that
D.where