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【简答题】
假设总体 服从参数为 的泊松分布,0.8,1.3,1.1,0.6,1.2是来自总体 的样本容量为5的简单随机样本,则 的矩估计值 ____.
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【单选题】She goes ____________ home. [     ]
A.
 /
B.
to
【简答题】Read and complete. Lisa has a busy week. She goes to music class on Monday. On Tuesday she goes to the library. On Thursday she has to go to buy some food and drinks because on Friday she has a party ...
【单选题】铸造金属全冠牙合面预备的间隙一般要求为
A.
0.2~0.3 mm
B.
0.3~0.5 mm
C.
0.5~1.0 mm
D.
1.0~1.5 ram
E.
以上都不正确
【简答题】读短文,回答下列问题。 Jane lives in China. She works in a school. She goes to work by bike. She goes back home at about six. She watches TV in the evening. She likes playing the violin. She often draws pictures...
【单选题】以下银汞合金填充操作不正确的是()
A.
少量多次填充
B.
每次送入窝洞的银汞合金量在铺平后不超过1mm厚
C.
银汞合金从调制到填充完毕、雕刻成形应在7分钟内
D.
邻牙合面洞先填面洞,再填邻牙合面洞
E.
24小时后方可打磨抛光
【简答题】She gets tons of ______ (关注) everywhere she goes此题出自2015年湖北鄂州中考英语真题及答案,,2015年湖北鄂州中考英语试题及答案 根据括号内的英(汉)语提示,完成句子。 She gets tons of ______ (关注) everywhere she goes.
【单选题】铸造金属全冠牙合面预备的间隙一般要求为
A.
0.2-0.3mm
B.
0.3-0.5mm
C.
0.5-1.0mm
D.
1.0-1.5mm
E.
以上都不正确
【单选题】银汞合金充填多少小时后可以打磨抛光
A.
1.5
B.
3
C.
12
D.
24
E.
36
【判断题】在刚刚停跳的心脏,给其左心室一次阈强度的电刺激,会引起局部心肌的收缩。(    )
A.
正确
B.
错误
【单选题】(It) is (important) that she (goes to) see the doctor (immediately).
A.
It
B.
important
C.
goes to
D.
immediately
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