下列 ______表达式的值是1239。A．Len("1234")+5 B．Val(

根据短文内容，回答问题。

     Dick is seven years old. He begins to go to school this term. He studies very hard and listens to the teachers

carefully. He is polite (礼貌) and has lots of friends. So they all like him very much.

     It's Saturday today. Dick, his sister Kate and his mother stay at home. His mother is doing some housework

and he is watching TV and the girl is doing her homework. At ten his father comes back from the farm with a

bag of apples. The boy likes them very much and wants to eat some. His mother gives him four apples and says,

"Go to wash them in the kitchen."

     Dick washes the apples and then gives them back to his mother. The woman says, "Which apple do you

want, Dick?"

     "The biggest one, Mummy."

     "What?" says Dick's mother,"You should be polite and want the little one."

     "Should I tell a lie just to be polite, Mummy?"

1. At what age do children begin their schooling in Dick's country?

    _____________________________________________________________

2. Is Dick's sister a student?　

    _____________________________________________________________

3. Why does the mother ask Dick to wash four apples

    _____________________________________________________________

4. Who do you think may eat the biggest apple?

    _____________________________________________________________

5. What's the meaning of "just to be polite" in the last paragraph in Chinese?

    _____________________________________________________________

_____makes him different is ______he can offer more information.

A．What , that

B．which, that

C．That, that

D．That, what

胆固醇不能转化成

A．胆汁酸

B．维生素D₃

C．睾酮

D．雌二醇

E．胆红素

RAB指派成功率反映用户平面连接建立情况，直接体现RNC或小区接纳能力。

（）：就是直接用手的触觉来判断是否藏有异常或危险物品。

A.摸

B.掂

C.捏

D.摇