皮皮学，免费搜题
登录
搜题
【单选题】
发生器内溴化锂稀溶液被加热产生冷剂蒸汽后变为浓溶液，这一浓度变化范围是溴化锂制冷机运转的经济性指标，称作（）。A.
放气范围
B.
发生效率
C.
蒸发范围
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
【单选题】听力原文：They specialize in long-term savings accounts and usually lend money for mortgages. (5)
A.
They usually hold savings accounts.
B.
They have current accounts.
C.
They specialize in long-term savings accounts and mortgages.
D.
They deal in short-term savings accounts.
【简答题】管路系统中的总压力损失等于所有管路系统中的 和 之和。
【单选题】Usually the borrowing firm of term loans promises to repay ______.
A.
the principal and interest until the end of the loan period
B.
the principal and interest at the end of the loan period
C.
the loan in a series of installments
D.
at any time when cash is more abundant ______.
【单选题】The term ‘ u’ in an econometric model is usually referred to as the _____
A.
error term
B.
parameter
C.
hypothesis
D.
dependent variable
【单选题】Human migration: the term is vague. What people usually think of is the permanent movement of people from one home to another. More broadly, though, migration means all the waysfrom the seasonal drift...
A.
Migration exerts a great impact on population change.
B.
Migration contributes to mankind's progress.
C.
Migration brings about desirable and undesirable effects.
D.
Migration may not be accompanied by human conflicts.
相关题目：