血涂片瑞氏染色时,缓冲液常用的pH值为( )
A.5.5~6.0B.6.0~6.5C.6.4~6.8D.7.0~7.5E.7.5~8.0
参考答案:C
—I’m sorry I ________ my exercise book at home this morning.
—It doesn’t matter. Don’t forget ________ it here this afternoon.
A.left; to take
B.forgot; bringing
C.left; to bring
D.forgot; to bring
新疆牧场以山地牧场为主,天山北坡的牧民,他们的“家”随季节变化而移动。牧民“家”的位置与季节对应关系合理的是
A.山前平原—夏季
B.高山-春季
C.谷地-冬季
D.沙漠-秋季