【单选题】Dick had to work after class and during his holidays because ______.
A.
his parents told him to make more friends
B.
he wanted to become a rich man
C.
he couldn't go on with his studies without enough money
D.
he had nothing to do at home
【单选题】关于战略与纳什均衡的理解,下面正确的是
B.
如果一个协议不构成纳什均衡,它就不可能自动实施
【单选题】Craig, a marketing manager at HeliZone Inc., rarely takes initiative or suggests new ideas during project meetings. He does his work halfheartedly and needs to be guided by his manager on a regular ba...
【单选题】能证明碳酸比硅酸酸性强的实验事实是 [ ]
B.
高温下能发生反应Na 2 CO 3 +SiO 2 Na 2 SiO 3 +CO 2 ↑
C.
CO 2 溶于水生成碳酸,而SiO 2 却不溶于水
D.
CO 2 通入Na 2 SiO 3 溶液中有胶状沉淀生成
【简答题】During
his work on child protection, he often acts as a(n) ________between parents and
children, the parents know what they can do and what they cannot do.A. mediator B. transmitter C. speculat...
【单选题】During his work on child protection, he often acts as a(n)________ between parents and children, making the parents know what they can do and what they cannot do.
【单选题】能证明碳酸比硅酸酸性强的实验事实是( )
B.
高温下能发生反应:Na 2 CO 3 +SiO 2 高温 . Na 2 SiO 3 +CO 2 ↑
C.
CO 2 溶于水生成碳酸,而SiO 2 却不溶于水
D.
CO 2 通入NaSiO 3 溶液中有胶状沉淀生成
【单选题】能证明碳酸比硅酸酸性强的实验事实是
A.
H 2 CO 3 比H 2 SiO 3 受热易分解
B.
高温下能发生反应Na 2 CO 3 +SiO 2 Na 2 SiO 3 +CO 2 ↑
C.
CO 2 能溶于水生成碳酸,而SiO 2 却不溶于水
D.
CO 2 通入Na 2 SiO 3 溶液中有胶状沉淀生成
【单选题】During his work on child protection, he often acts as a(n) ________ between parents and children, making the parents know what they can do and what they cannot do.