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【单选题】
化学物质的哪些理化性质影响其毒作用 ( )
A.
电离度
B.
溶解度
C.
挥发度
D.
比重
E.
以上都是
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【单选题】I am sorry _______ you such a lot of trouble by the delayed shipment.
A.
cause
B.
causing
C.
to be caused
D.
to have caused
【单选题】已知,如图,点A、B、C分别为DB、EC、FA的中点,若△ABC的面积为1,则△DEF的面积为(  )
A.
5
B.
6
C.
7
D.
8
【单选题】室温时,将浓度和体积分别为 、 的NaOH溶液和 、 的 溶液相混合,下列关于该混合溶液的叙述错误的是
A.
若 ,则一定是
B.
在任何情况下都是
C.
当pH=7时,若 ,则一定是
D.
若 , ,则
【多选题】Refer to the exhibit. On the basis of the output generated by the show commands,  which two  statements are true?()
A.
Because it is configured as a trunk interface, interface gigabitethernet 0/1 does not appear in  the show vlan output.
B.
VLAN 1 will not be encapsulated with an 802.1q header.
C.
There are no native VLANs configured on the trunk.
D.
VLAN 2 will not be encapsulated with an 802.1q header.
E.
All interfaces on the switch have been configured as access ports.
F.
Because it has not been assigned to any VLAN, interface gigabitethernet 0/1 does not appear in  the show vlan output.
【简答题】A.Doctor and husband. B.Shop-assistant and customer. C.Host and guest. D.Teacher and student.
【简答题】A.Doctor and patient. B.Boss and secretary, C.Waitress and guest. D.Husband and wife.
【单选题】如图,直线l上有三个正方形a,b,c,若a,c的面积分别为3和4,则b的面积为(  )
A.
3
B.
4
C.
5
D.
7
【简答题】A. Doctor and husband. B. Shop-assistant and customer. C. Host and guest. D. Teacher and student.
【单选题】在△ ABC 中,角 A 、 B、C 的对边分别为 ,若 ,三角形面积为 , ,则 ( ▲ )
A.
7              
B.
8            
C.
5          
D.
6
【单选题】Parents have to show due concerns to their children's creativity and emotional output otherwise what they think beneficial to the kids might probably______their enthusiasm and aspirations.
A.
hold back
B.
hold to
C.
hold down
D.
hold over
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