什么是汽轮机的转子?转子的作用是什么?
参考答案:
汽轮机中所有转动部件的组合体叫做转子。转子的作用是承受蒸汽对所有工作叶片的回转力,并带动发电机转子、主油泵转动。
下列设备中,不属于手持设备的是_______。
A.笔记本电脑
B.商务通
C.PDA
D.第3代手机
The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.
If n is a positive integer and m=6.25×10n what is the value of n ?() (1) 500<m<5,000 (2) m<6,250
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.