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单项选择题

如果一个函数的切线斜率处处为0，则这个函数的图象是水平直线.
A、正确
B、错误

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多项选择题
卵巢能够分泌的激素有（    ）。
A、雌激素
B、孕激素
C、雄激素
D、催产素
未知题型
听力原文：Man: I have monthly targets set by head officE.Now, customers usually need a lot of help choosing the right product, which is fair enough, but at the same time I've got to make sure that what I do is cost-effective for the company, so I have to watch my time and expenses carefully.
&8226;You will hear five short recordings. Each speaker is saying what a manager must do to achieve success.
&8226;For each recording, decide which is the most important action for that speaker.
&8226;Write one letter (A-H) next to the number of the recording.
&8226;Do not use any letter more than oncE.
&8226;After you have listened once, replay each recording.
A.sort out staff disagreements
B.delegate tasks fairly
C.obtain all the facts
D.develop a range of strategies
E.establish clear goals
F.carry out regular planning
G. clarify all job descriptions
H. act immediately
判断题
张三是美籍华人，现居住在美国，在国内没有住所，某年度没有来过中国大陆，所以不可能会成为个人所得税的纳税人。 （ ）
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