阅读理解。

1. What kind of animals does Huang Xiaoming like? [ ]

A. Pandas.

B. Monkeys.

C. Tigers.

D. Lions.

2. Which is TRUE about Angelina Jolie? [ ]

A. She is good at everything.

B. She can't shoot well.

C. She can't cook by herself.

D. She can cook well.

3. Why have people grown tired of Chen Luyu's show according to the passage? [ ]

A. Because she isn't famous for her talk show.

B. Because she set up an online version of talk show.

C. Because she has the habit of constantly asking, "Really?".

D. Because she likes to express herself.

4. What does the underlined word "adopt" mean in the first paragraph? [ ]

A. 批准

B. 继承

C. 采纳

D. 收养

5. We can know from the passage that _______. [ ]

A. Angelina Jolie is a shy actress

B. Chen Luyu isn't famous any more

C. Huang Xiaoming is a kind man

D. All the three stars are Chinese

某同学在做探究弹力和弹簧伸长的关系的实验中，设计了如图所示的实验装置．所用的钩码每只的质量都是30g，他先测出不挂钩码时弹簧的自然长度，再将5个钩码逐个挂在弹簧的下端，每次都测出相应的弹簧总长度，将数据填在了下面的表中．（弹力始终未超过弹性限度，取g=10m/s²）

（2）上一问所得图线的物理意义______该弹簧的劲度k=______N/m（保留三位有效数字）．