A. they were different from the local ones B. they were very beautiful C. they could make Tony happy 参考答案:C 答案解析:由于the boy like the birds very much所以选[C]。
第12题: [单项选择]碱性磷酸酶测定推荐使用的缓冲液是() A. 碳酸盐 B. 二乙胺 C. 2-氨基-2-甲基-1-丙醇 D. Tris-HCl E. 醋酸盐 参考答案:C 答案解析:本题考查碱性磷酸酶测定使用的缓冲液,用于ALP测定的缓冲液分为3类。①惰性型:如碳酸盐缓冲液和巴比妥缓冲液;②抑制型:如甘氨酸缓冲液;③活性型:如AMP(2-氨基-2-甲基-1-丙醇)、Tris和2-