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【单选题】
已知 NH 3 . H 2 O 的解离平衡常数为 K b Θ , NH 4 Cl 的水解平衡常数等于( )。A.
B.
K b Θ / Kw Θ
C.
Kw Θ / K b Θ
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【简答题】There has been a considerable increase in... (Par. 7)
【单选题】用视距法测量水平距离时,需要用全站仪观测的数据是( )。
A.
上、中、下丝读数及竖盘度数
B.
中丝读数及竖盘度数
C.
上、中、下丝读数
D.
上、下丝读数及竖盘度数
【单选题】Why did IBM decide to sell its PC business?
A.
Because IBM has been brewing this sale for about 10 years.
B.
Because IBM is going to produce mobile phones that have access to the Internet.
C.
Because IBM can enlarge its PC sales with this merger.
D.
Because IBM no longer enjoys any edges in PC making.
【多选题】替代品能够满足客户需求的其他产品或服务,下面选项( )属于替代品的威胁。
A.
替代品在价格上的竞争力
B.
替代品质量和性能的满意度
C.
客户转向替代品的难易程度
D.
替代品数量的多少
E.
替代品的生命周期
【单选题】— Has the robber been put into prison? — Yes. He was _____ by the police when boarding a plane for Paris. [ ]
A.
frightened
B.
spotted
C.
persuaded
D.
informed
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