第5题: [多项选择]情景: 你的一位朋友来到美国,刚通过驾驶执照。 要求: 写一张便条给你的朋友,告诉他驾驶执照的基本用途。 参考答案:[参考范文l Dear Zhang, Here is something basic about a driving licence(执照,许可)for your reference(供你参考): After passing a driving test, you can get a driver’s licence and is allowed to drive. In the U. S. A. the driver’s licence is almost as important as the ID (身份证) card. It has got all kinds of information about the driver. A sales person may ask a customer to show his or her driver’s licence to make sure that the man’ s check is valid (有的). Good luck ! Fang Jian
第6题: [单项选择]研究颅面生长发育常用的研究方法是() A. X线头影测量 B. 牙片 C. 咬合片 D. 胸片 E. 口腔颌面部CT常规扫描检查 参考答案:A
第29题: [单项选择]临界胶束浓度为() A. Krafft点 B. 昙点 C. HLB D. CMC E. CRH 参考答案:D 答案解析:此题重点考查表面活性剂性质及应用中名词缩写表示的意义。Krafft点是离子型表面活性剂的特征值;昙点为表面活性剂溶解度下降,出现浑浊时的温度;HLB为亲水亲油平衡值;CMC为临界胶束浓度。所以本题答案