皮皮学，免费搜题
登录
搜题
【单选题】
与兴奋性突触后电位形成有离子是（）A.
K + 、Na + ，尤其是K +
B.
K + 、Na + ，尤其是Na +
C.
K + 、Na + 、Cl，尤其是Cl -
D.
Ca 2+ 、K + 、cr，尤其是K +
E.
K + 、Cl - ，尤其是Cl -
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】Scanning is one type of pre-reading activity, which means to read to locate ( ) information.
【单选题】Black and Decker produces tools at a plant in North Carolina and ships the tools to retailers in England. This is an example of which type of international business activity?
A.
merchandising
B.
importing
C.
exporting
D.
trading
【单选题】Which type of specialized junction allows plant cells to coordinate metabolic activity by providing channels for the passage of small molecules?
A.
gap junction
B.
electron transport
C.
desmosome
D.
plasmodesmata
【多选题】在参观游览或自由活动中,时常出现游客走失的情况,其原因主要有( ) 260
A.
导游人员未讲清游览线路或集合的时间、地点和停车位置
B.
导游人员没有向游客讲明景点的游览项目
C.
导游清点人数的次数不多
D.
旅游者自由活动、外出购物时没有记清所走线路和饭店的名称、地址
E.
游客因故脱离团队自己走失
【多选题】旅游者在旅游景点走失的原因主要有( )。
A.
地陪未讲清游览线路、集合时间、地点与停车位置
B.
地陪讲解欠佳，导致旅游者跑到其他旅游团听讲和游览
C.
地陪未讲清各景观游览的先后顺序和周围环境情况
D.
旅游者对游览中见到的某一景观或事物感兴趣而自行走散
E.
旅游者忘记了地陪关于游览线路、集合时间、地点和停车位置的提示
【单选题】第三章5-8题 In Skinner’ s Operant Conditioning, which type of reward schedule can provide steady continuous level of activity?
A.
Variable Ratio
B.
Fixed Ratio
C.
Fixed Interval
D.
Variable Interval
【单选题】Which type does the following production practice belong to? The students repeat what the teacher says. This activity can practice individual sounds, individual words, groups of words, and sentences.
A.
Listen and repeat
B.
Fill in the blanks
C.
Make up sentences
D.
Use meaningful context
相关题目：