皮皮学，免费搜题
登录
搜题
【简答题】
Pick up three journal articles you have collected in your literature search. Read the methodology section of each article again. For each article, try to find answers to the following questions: (1) Is it a case study? If it is, what case(s) is used? Why is this case(s) selected? If it is not a case study, you may skip this question and go directly to Question (2). (2) What type of data is used, primary or secondary? If secondary data are used, where did the data come from? Were the sources reliable or authoritative? How does the author(s) justify the choice? (3) Is it a qualitative or a quantitative study or a combination of both? Why does the author(s) choose such a category? How does the author(s) justify this choice? Is it convincing? (4) What data collection methods were used? How are they justified? Is it mentioned that there might be potential problems associated with these methods? If it is mentioned, what are these problems? If it is not, can you perceive any potential problems? (5) How does the methodology section shed light on the design of your own research?
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】模拟信号传输的基础是载波,载波具有三个要素,即[填空(1)]、[填空(2)]、[填空(3)]。
【简答题】模拟信号传输的基础是载波,载波具有3个要素,即( )、( )、( )。在模拟数据通信系统中,针对载波的不同要素可以对数字数据进行调制,有3种调制信号的方法,分别是( )、( )、( )。
【简答题】下面的描述中，不属于面向对象方法的是（ ）。 A)多态 B)继承 C)类 D)过程调用
【单选题】泌尿系统检査错误的做法是
A.
器械检查时要仔细轻柔 , 忌用暴力
B.
血管造影前可不做碘过放试验
C.
器械检查时应注意无菌操作
D.
器械检查后常规口服抗生素 2~3 日 , 预防感染
【单选题】关于泌尿系统影像学检查，以下错误的是( )。
A.
B超已作为诊断泌尿系统疾病的筛选方法
B.
尿路X线可以显示肾轮廓及所有上尿路结石
C.
数字减影血管造影，能精确诊断肾动脉及其分支疾病
D.
逆行肾盂造影适用于禁忌做排泄性尿路造影或显影不清时
E.
对泌尿系统肿瘤的诊断，MRI能提供较CT更为可靠的依据
【单选题】向等物质的量浓度的NaHCO 3 和Ca(HCO 3 ) 2 的混合溶液中，加入一定量NaOH溶液时，不可能发生的离子反应方程式是 ( )。
A.
OH － ＋HCO 3 — =CO 3 2 — ＋H 2 O
B.
Ca 2 ＋ ＋OH － ＋HCO 3 — =CaCO 3 ↓＋H 2 O
C.
Ca 2 ＋ ＋2OH － ＋2HCO 3 — =CaCO 3 ↓＋2H 2 O＋CO 3 2 —
D.
Ca 2 ＋ ＋3OH － ＋3HCO 3 — =CaCO 3 ↓＋3H 2 O＋2CO 3 2 —
【简答题】模拟信号传输的基础是载波,载波具有3个要素,即( )、( )和( )。
相关题目：
【单选题】泌尿系统检査错误的做法是
A.
器械检查时要仔细轻柔 , 忌用暴力
B.
血管造影前可不做碘过放试验
C.
器械检查时应注意无菌操作
D.
器械检查后常规口服抗生素 2~3 日 , 预防感染