On the evening of January Dth，B00E，I found au electronic dictionary in the English reading-room on the Crd floor of the new library in the east district of our university.
The electronic dictionary can be generally described as follows: It is brand new and metallic gray in color. What’s more, the portable electronic dictionary is as big as a piece of cake and as thin as aregular magazine. Theowner of the electronic dictionary may contact me now. My room phone number andmobile phone number are (0A0)FB0DCCD0 and ACH0AA0FDAD respectively. Please make appointment in advance.
第17题: [单项选择]HGPRT参与 A. 嘌呤核苷酸从头合成 B. 嘌呤核苷酸补救合成 C. 嘧啶核苷酸分解代谢 D. 嘌呤核苷酸分解代谢 参考答案:B 答案解析:①嘌呤核苷酸的分解代谢产物是尿酸，黄嘌呤氧化酶参与此代谢过程。②嘌呤核苷酸补救合成是利用现有的A、G、I，由PRPP(磷酸核糖焦磷酸)提供磷酸核糖，在APRT(腺嘌呤磷酸核糖转移酶)、HGPRT(次黄
第22题: [单项选择]二氧化氯消毒的特点是 A. 消毒效果稳定，能够消除水色，但成本高，且受pH影响 B. 消毒效果稳定，能够消除水色，不受pH影响，但成本高 C. 消毒效果不稳定，但能够消除水色，成本较低，不受pH影响 D. 消毒效果稳定，但对水色效果不明显，成本高，且受pH影响 E. 消毒效果稳定，能够消除水色，成本较低，但受pH影响 参考答案:B
