单项选择题
The money market is the market in which longer term debt instruments (generally those with original maturity terms of one year or greater) and equity instruments are traded. （ ）
判断题 商标不注册也不可以适用
单项选择题 一台机器空转，对外不作功，这时机器的效率 。
单项选择题 咽侧体属于昆虫的（ ）系统组成部分。
