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【单选题】
施热前，热水袋需用棉布包裹，其主要目的是
A.
保持水袋的清洁
B.
方便热水袋的消毒
C.
促进患者的舒适
D.
防止皮肤烫伤
E.
延缓热水袋老化
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【单选题】Mrs. Brown had a small garden behind her house, and in the spring she planted some vegetables in it. She looked after them very carefully, and when summer came they looked very nice. One evening Mrs. ...
A.
Right.
B.
Wrong.
C.
Doesn’t say.
【单选题】B In 1943, when I was 4, my parents moved from Coeur d’Alene, Idaho, to Fairbanks, Alaska, where adventure was never far away. We arrived in the summer, just in time to enjoy the midnight sun. All tha...
A.
Leonhard was good at driving dog sleds.
B.
The author spent his whole childhood in Alaska.
C.
Leonhard often visited the author’s family after 1950.
D.
The author suffered a lot while taking the dog sled in Alaska.
【多选题】随机变量的分布包含（ ）。
A.
随机变量可能取哪些值，或在哪个区间上取值
B.
随机变量在某一确定区间上取值的概率是多少
C.
随机变量的取值频率是多少
D.
随机变量在任一区间的取值频率是多少
E.
随机变量取这些值的概率是多少，或在任一区间上取值的概率是多少
【单选题】One morning a mailman walked up to a house. He rang the bell. A moment later a window of the house opened, and a woman put her head out. "What’s it" she wanted to know. "I’ve got a package(包裹) for Mrs...
A.
No, she didn’t.
B.
Yes, because the mailman told her.
C.
Yes, because she knew what kind of shop Jones and Jones was.
相关题目：
【单选题】Mrs. Brown had a small garden behind her house, and in the spring she planted some vegetables in it. She looked after them very carefully, and when summer came they looked very nice. One evening Mrs. ...
A.
Right.
B.
Wrong.
C.
Doesn’t say.
【单选题】B In 1943, when I was 4, my parents moved from Coeur d’Alene, Idaho, to Fairbanks, Alaska, where adventure was never far away. We arrived in the summer, just in time to enjoy the midnight sun. All tha...
A.
Leonhard was good at driving dog sleds.
B.
The author spent his whole childhood in Alaska.
C.
Leonhard often visited the author’s family after 1950.
D.
The author suffered a lot while taking the dog sled in Alaska.
【多选题】随机变量的分布包含（ ）。
A.
随机变量可能取哪些值，或在哪个区间上取值
B.
随机变量在某一确定区间上取值的概率是多少
C.
随机变量的取值频率是多少
D.
随机变量在任一区间的取值频率是多少
E.
随机变量取这些值的概率是多少，或在任一区间上取值的概率是多少
【单选题】One morning a mailman walked up to a house. He rang the bell. A moment later a window of the house opened, and a woman put her head out. "What’s it" she wanted to know. "I’ve got a package(包裹) for Mrs...
A.
No, she didn’t.
B.
Yes, because the mailman told her.
C.
Yes, because she knew what kind of shop Jones and Jones was.
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