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【单选题】
我国现存最大的皇家园林是A.
承德避暑山庄
B.
颐和园
C.
北海公园
D.
北京恭王府
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【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 1. We’ve received too many letters of ____________ this month.
【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 6. In this ________, it is very easy to get scared.
【单选题】轴的直径为f300mm ,其轴线的直线度公差在图样上的给定值为f0.01
A.
,则直线度公差的最大值可为( )。
B.
f0.01mm
C.
f0.02mm
D.
f0.03mm
E.
f 0.04mm
【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 7. They know the importance to keep the ________ of the team.
【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 5. You could have offered a smile; ______ you chose to keep silence...
【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 9. Our shop _______ sell goods from door to door.
【简答题】（18分）钛被誉为“二十一世纪的金属”，用途广泛。按下图所示组成的产业链可以大大提高资源利用率并能减少环境污染。请回答下列问题： （1）已知中FeTiO 3 元素的化合价为+3，钛铁矿经氯化法得到四氯化钛的过程中________元素被氧化，每生产1. 9kgTiCl 4 消耗Cl 2 在标准状况下的体积为________L。 则金属Mg还原TiCl 4 制取金属Ti (s)的热化学方程式为____...
【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 3. We are _________ seeing you this summer vacation.
【简答题】设用图示的压榨机来压榨弹性体4，已知每压入1mm需10N的力，球B与B'分别重160N，球心离轴线的距离为300mm，其臂及螺旋的重量及惯性均略去不计。方牙螺旋的平均直径为44mm，螺距为20mm，摩擦因数f=0.08，止推球轴承处的摩擦不计，平板C重量为100N，如物体A需压缩100mm，且无附加能量加至机构中，求在压缩开始瞬时，球B必须具有的角加速度。
【简答题】regret , assistant , complaint, look into , situation , compete turn a deaf ear to , instead , look forward to , cooperate , balance 10. We ________ that we cannot accept phone orders.
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