木模板的周转次数少、成本高，易于加工，大多用于异形模板。 钢模板周转次数多，成本低，广泛用于水利工程建设中。

离子化合物NaCl固体中，不存在独立的NaCl分子。 ...

判断题离子化合物NaCl固体中，不存在独立的NaCl分子。
正确
错误

Spleen meridians of Foot Taiyin connect to the tongue b...

单项选择题Spleen meridians of Foot Taiyin connect to the tongue body, as well as spreading over the lower surface of the tongue.
A、正确
B、错误

In order to increase the density and the adhesion of a ...

单项选择题In order to increase the density and the adhesion of a CVD film, one should
A、raise the wafer temperature.
B、increase the pressure in the chamber.
C、use the hot wall design.
D、increase the gas flow rate in the chamber.