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【单选题】
关于社群电商的正确解释是( )。A.
是一群有相互关系的人形成的网络，其中人与人产生交叉关系，通常形成了深入的情感链接
B.
通常大家会把它理解为传统的交易型电商，即以淘宝、天猫、京东、易购、一号店、唯品会等为代表，以商品运营为核心，以仓储物流配送为基础的电商模式
C.
即前端通过网红吸引流量，后端对接供应链的电商模式
D.
基于移动互联网的空间，借助于社交软件为工具，以人为中心，社交为纽带的新商业，通常理解为基于微信生态的社会化分销模式
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举一反三
【单选题】The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner .
A.
in the event of a flame failure
B.
in the event of a stack fire
C.
when the water level reach the crown sheet
D.
when the feed pump discharge pressure drops to a preset minimum
【单选题】Parasite power is very useful for applications ______ require remote temperature sensing or that are very space constrained.
A.
what
B.
while
C.
that
【简答题】在茶艺服务接待德国客人时,不要向其推荐( )茶点。
【单选题】_____ is used for sensing the temperature of the room in the air condition system.
A.
An expansion valve
B.
An evaporator
C.
A thermostat
D.
A condenser
【单选题】temperature sensing protective devices operate a control circuit which can ( )the current when the device reaches a predetermined temperature.
A.
switch off
B.
switch on
C.
operate
【单选题】Temperature sensing protective devices operate a control circuit which can ______the current when the device reaches a predetermined temperature.
A.
switch off
B.
switch on
C.
operate
D.
无
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