计算:(3+x)(3-x)+(x+1)2.

题型:解答题

问题:

计算:(3+x)(3-x)+(x+1)2

考点:平方差公式完全平方公式
题型:解答题

干式显像剂用()灵敏度最高。

A.浸入法

B.喷雾法

C.流淌法

D.静电喷涂法

题型:解答题
        根据对话内容,将方框内符合对话情景的句子抄写在对话的空白处,使对话恢复完整。选项中有两项是多余的。
A: Exc:use me, l'd like to ask you some questions, Miss Black.____1____
B: Not very big, but  I don't think it's small.1 have two brothers. The elder
one is married.
A: Do your brother aIl his wife have any children?
B:Yes._________2_____________
A: Boys or girls?
B:A boy and a girl.
A: Oh, how lucky they are!
B: In China, there are still quite a lot of large families.
A:_______3__________Thanks to the "one-child" policy, fewer and fewer
families now have more than one child.________4__________
B:______5_______Is your family large?
A: No,I have only one sister, but my grandparents also live with us.
B: In America, many children live far away from.their parents when they are
just 18 0r 19.
A: In China, too. More and more young people live far away from their
parents when they are
married.
How about your family?
How old are you?
Why don't you have more children?
I agree with you.
Do you have a big family?
So more and more families are becoming richer and richer.
My sister-in-law aave birth to twins last March.
题型:解答题

净化系统的组成有()组成。

A、烟气收集部分

B、新鲜氧化铝

C、高压离心风机部分

D、冰晶石

题型:解答题

打开窗体时,首先发生的事件是()

A.加载(Load)

B.打开(Open)

C.激活(Activate)

D.成为当前(Current)

题型:解答题

配备辐射传感器的气象站,遇有雨雪等特殊天气现象出现、结束时,应及时盖、开辐射表防护罩,清除玻璃罩(薄膜罩)上的附着物,并在备注栏加以注明,否则每影响(或丢失)1个记录算1个错情。()

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