【简答题】变量x、y满足 (1)假设 z =4 x -3 y ,求 z 的最大值. (2)设 z = ,求 z 的最小值. (3)设 z = x 2 + y 2 ,求 z 的取值范围.
【单选题】在吹气式液位传感器中,随着液位的升高,平衡气室逸出的气泡量及导管压力的变化分别为?
【单选题】This book______18 articles , _______ three written by my father.
【多选题】假设等比数列的第一项 a=1 ,公比 q=2 ,下面程序的功能是求满足前 n 项和小于 100 的最大 n ,请选择填空。【 1 】在 A~D 中选,【 2 】在 E~G 中选 #include int main() { int a = 1,g = 2,n = 0,sum = 0; do { 【 1 】 ; ++n;a *= g; }while(sum < 100); 【 2 】 ; printf...
【单选题】在吹气式液位传感器中,随着液位的升高,平衡气室溢出的气泡量及导管压力的变化分别为_____。
【单选题】在吹气式液位传感器中,随着液位的升高,平衡气室逸出的气泡量及导管压力的变化分别为 。
【单选题】Project(69)Management includes the processes required to ensure that the project includes all the work required, and only the work required, to complete the project successfully.
【单选题】According to Sarah, recorded delivery
A.
includes all the compensation for loss.
B.
includes a certificate of posting.
C.
is perfect for sending documents of minor value.
D.
is usually handled by very particular couriers.
【单选题】The book ten units, two revisions .
【单选题】使用光学平直仪测量回转工作台及分度盘的分度精度时,还需要在量具厂订做 ( ) 。