皮皮学，免费搜题
登录
搜题
【判断题】
目前,在B2C电子商务模式中主要的支付方式有货到付款、汇款和电子支付。A.
正确
B.
错误
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】魔棒工具的默认容差值是 __________ 。
【简答题】使用魔棒工具做选区,容差的默认值是 ,输入的值越小,选取的颜色范围越 ,选取范围则 。
【单选题】If the high-pressure switch on the compressor opens and stops the compressor a possible cause could be:
A.
too much cooling water going through the condenser
B.
not enough refrigerant in the system
C.
a leak in the evaporator coils
D.
no enough cooling water going through the condenser
【单选题】The unloading system on an air compressor will _____.
A.
increase compressor discharge pressure on demand
B.
increase compressor operating speed as necessary
C.
allow the motor to turn the compressor opposed only by friction
D.
reduce the compressor frictional load when starting
【单选题】If the discharge valves on a refrigeration compressor are leaking badly, the compressor should _____.
A.
run continuously
B.
not start
C.
have high discharge pressure
D.
short cycle on the high pressure switch
相关题目：