硅酸盐水泥熟料矿物中对早期强度及后期强度都有贡献的是()
A、C3A
B、C4AF
C、C3S和C4AF
D、C2S
参考答案:C
在放大器中,由于基极电流和集极电流间分配涨落而引起的噪声称为()。
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.
A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20 ?() (1) The rectangle has a length of 16. (2) The rectangle has a width of 9.
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.