【单选题】______ does your cousin do? He is a worker. [ ]
【单选题】What does your mother do ? . [ ]
C.
She is an office worker .
【判断题】测相伪距观测方程中,观测到nj颗卫星,每个测站上有待求参数5个,站点的3个位置参数、1个接收机钟差和1个初始整周模糊度。
【简答题】用机械法分离原生质体的主要缺点是: ;优点是 。
【单选题】What does the speaker say about achieving goals?
A.
It leaves the worker with a feeling of satisfaction.
B.
It gives the company greater productivity each day.
C.
It allows employees to prepare for the next task.
D.
It enables employers and employees to communicate.