【单选题】国产水准仪的型号一般包括DS 05 、DS 1 、DS 3 ,精密水准仪是指(): A. DS 05 、DS 3 B. DS 05 、DS 1 C. DS 1 、DS 3 D. DS 05 、DS 1 、DS 3

(dx/ds)2+(dy/ds)2+(dz/ds)2=1

理想气体由同一始态出发，分别经（1）绝热可逆膨胀；（2）多方过程膨胀,达到同一体积V2，则过程(1)的熵变DS(1)和过程(2)的熵变DS(2)之间的关系是： A: DS(1) > DS(2) B: DS(1) < DS(2) C: DS(1) = DS(2) D: 两者无确定关系

Mike and Sandy are two woodworkers who both make tables and chairs. In one month, Mike can make 4 tables or 20 chairs, where Sandy can make 6 tables or 18 chairs. Given this, we know that the opportunity cost of 1 chair is

Sean got a job of 　 at a fast-food restaurant. A: wait for tables B: waiting for tables C: waiting tables D: /

​要使DataGridView1控件显示数据集ds1中的表stinfo的数据，可以使用（ ）语句。‎ A: DataGridView1.DataSource = ds1.Tables(“stinfo”) B: DataGridView1.Visible = ds1.Tables(“stinfo”) C: DataGridView1.Columns= ds1(“stinfo”) D: DataGridView1.ds1(“stinfo”)=True

要使DataGridView1控件显示数据集ds1中的表stinfo的数据，可以使用（ ）语句。 A: DataGridView1.DataSource = ds1.Tables(“stinfo”) B: DataGridView1.Visible = ds1.Tables(“stinfo”) C: DataGridView1.Columns= ds1(“stinfo”) D: DataGridView1.ds1(“stinfo”)=True

要使DataGridView1控件显示数据集ds1中的表stinfo的数据，可以使用（ ）语句。 A: DataGridView1.DataSource = ds1.Tables("stinfo") B: DataGridView1.Visible = ds1.Tables("stinfo") C: DataGridView1.Columns= ds1("stinfo") D: DataGridView1.ds1("stinfo")=True

"To turn the tables" means ______. A: to move the tables B: to carry the tables away C: to gain courage D: to gain an advantage after having been at a disadvantage

New oak tables are normal goods. What would happen to the equilibrium price and quantity in the market for oak tables if the price of maple tables rises, the price of oak wood rises, more buyers enter the market for oak tables, and the price of wood saws increased?