厚度变化很小,规律明显,结构简单至较简单的煤层为()煤层。
A. 稳定
B. 较稳定
C. 不稳定
D. 极不稳定
A cargo that has a stowage factor over 40 CBF per M/T is known as a ______.
A. Hygroscopic cargo
B. Measurement cargo
C. Stowage cargo
D. Weight cargo
There are 45 students in each class of the schools.
泡芙面糊成形前应做好准备工作,如准备好干净烤盘,上面刷一层()油脂。
A. 厚厚的
B. 薄薄的
C. 浓浓的
D. 香香的