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【简答题】
某射手射击所得环数X的分布列如下： X 7 8 9 10 P x 0.1 0.3 y 已知X的期望E(X)＝8.9，则y的值为________．
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参考答案：
举一反三
【判断题】In 1984, Walton bet his store managers they could not earn a pretax margin larger than 8%. And he lost.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Walton lost the tennis match because ________ .
A.
a. he wished to be bird hunting
B.
b. he was annoyed to find his guest had lied ter the pep rally
C.
c. he was tired after the pep rally
D.
d. he was worrying about business
查看完整题目与答案
【单选题】抢占位置时, 正确判断篮板球的( )和距离,运用快速的脚步移动,抢占有利的位置。
A.
方位
B.
力量
C.
反弹方向
D.
速度
查看完整题目与答案
【单选题】抢占位置时，正确判断篮板球的( )和距离，运用快速的脚步移动，抢占有利的位置。
A.
反弹方向
B.
力量
C.
速度
D.
方位
查看完整题目与答案
【单选题】Walton lost the tennis match because ________ .
A.
he wished to be bird hunting
B.
he was annoyed to find his guest had lied to him
C.
he was tired after the pep rally
D.
he was worrying about business
查看完整题目与答案
【单选题】- Didn't you see the sign 'No Fishing!' on the right? - Sorry, I didn't. But now I know fishing_______ here.
A.
wasn't allowed
B.
isn't allowed
C.
won't allow
D.
doesn't allow
查看完整题目与答案
【单选题】抢占位置时，正确判断篮板球的（ ）和距离，运用快速的脚步移动，抢占有利的位置。
A.
力量
B.
反弹方向
C.
速度
D.
方位
查看完整题目与答案
【简答题】某物理兴趣小组用频闪照相的方法(每隔相等时间拍摄一张照片)研究小物块沿斜面向下做直线运动的有关问题。下图 1B-3 是他们某次实验时拍摄的频闪照片。 (1)下列四个图象中,一定不能反映小物块运动情况的是__________。 (2)要使小物块在斜面上运动的平均速度增大,可采用的方法有________________(写出一种即可)。 (3)只用秒表和刻度尺也可测出小物块沿斜面向下做直线运动某段距离...
查看完整题目与答案
【单选题】抢占位置时, 正确判断篮板球的( )和距离,运用快速的脚步移动,抢占有利的位置。
A.
方位
B.
力量
C.
速度
D.
反弹方向
查看完整题目与答案
【简答题】Walton lost the tennis match because _________________.(1.0分)A. he wished to be bird hunting B. he was annoyed to find his guest had lied to him C. he was tired after the pep rally D. he was worrying ...
查看完整题目与答案
相关题目：
【判断题】In 1984, Walton bet his store managers they could not earn a pretax margin larger than 8%. And he lost.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Walton lost the tennis match because ________ .
A.
a. he wished to be bird hunting
B.
b. he was annoyed to find his guest had lied ter the pep rally
C.
c. he was tired after the pep rally
D.
d. he was worrying about business
查看完整题目与答案
【单选题】抢占位置时, 正确判断篮板球的( )和距离,运用快速的脚步移动,抢占有利的位置。
A.
方位
B.
力量
C.
反弹方向
D.
速度
查看完整题目与答案
【单选题】抢占位置时，正确判断篮板球的( )和距离，运用快速的脚步移动，抢占有利的位置。
A.
反弹方向
B.
力量
C.
速度
D.
方位
查看完整题目与答案
【单选题】Walton lost the tennis match because ________ .
A.
he wished to be bird hunting
B.
he was annoyed to find his guest had lied to him
C.
he was tired after the pep rally
D.
he was worrying about business
查看完整题目与答案
【单选题】- Didn't you see the sign 'No Fishing!' on the right? - Sorry, I didn't. But now I know fishing_______ here.
A.
wasn't allowed
B.
isn't allowed
C.
won't allow
D.
doesn't allow
查看完整题目与答案
【单选题】抢占位置时，正确判断篮板球的（ ）和距离，运用快速的脚步移动，抢占有利的位置。
A.
力量
B.
反弹方向
C.
速度
D.
方位
查看完整题目与答案
【简答题】某物理兴趣小组用频闪照相的方法(每隔相等时间拍摄一张照片)研究小物块沿斜面向下做直线运动的有关问题。下图 1B-3 是他们某次实验时拍摄的频闪照片。 (1)下列四个图象中,一定不能反映小物块运动情况的是__________。 (2)要使小物块在斜面上运动的平均速度增大,可采用的方法有________________(写出一种即可)。 (3)只用秒表和刻度尺也可测出小物块沿斜面向下做直线运动某段距离...
查看完整题目与答案
【单选题】抢占位置时, 正确判断篮板球的( )和距离,运用快速的脚步移动,抢占有利的位置。
A.
方位
B.
力量
C.
速度
D.
反弹方向
查看完整题目与答案
【简答题】Walton lost the tennis match because _________________.(1.0分)A. he wished to be bird hunting B. he was annoyed to find his guest had lied to him C. he was tired after the pep rally D. he was worrying ...
查看完整题目与答案
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