Z41H是一种阀门的牌号，其中“Z”说明这种阀门是（）。
A.截止阀
B.闸阀
C.球阀
D.止回阀
参考答案：B
------How much money did she you yesterday?
------$500. I told him I would return it to her in three weeks.
A give B borrow C lend D make
可以转化为白血病的疾病是（）
A.霍奇金淋巴瘤
B.伯基特淋巴瘤
C.多发性骨髓瘤
D.MDS
E.传染性单核细胞增多症
