If surroundings do work on the system, its W is ( )
A: Greater than 0
B: Less than 0
C: Equal to 0
D: Cannot be determined
A: Greater than 0
B: Less than 0
C: Equal to 0
D: Cannot be determined
举一反三
- When we utilize tabular method for transportation problems, the criterion for the optimal solution is ( ). A: the test numbers of non-basic variables are greater than or equal to 0 B: the test numbers of basic variables are less than or equal to 0 C: the test numbers of basic variables are greater than or equal to 0 D: the test numbers of non-basic variables are less than or equal to 0
- 下列程序的运行结果是（ ）。t = 0 while t < 5: print(t, " is less than 5") t = t + 1else: print(t, " is not less than 5") A: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 55 is not less than 5 B: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 55 is not less than 5 C: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 5 D: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 5
- Consumption of the total life-cycle effort in software maintenance is（ ） that in software development． A: less than B: larger than C: equal or less than D: equal or larger than
- Consumption of the total life-cycle effort in software maintenance is (73) that in software development. A: less than B: larger than C: equal or less than D: equal or larger than
- After simplification of any force system in space, a force and a couple are obtained. The magnitude of this force is ( ) the principal vector of the force system. A: equal to B: more than C: less than D: not equal to