解方程（1）2x-11320+2.35=9（2）x：710=0.3x+12．_爱下问搜题

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问题解答题

解方程
（1）2x-1

13

20

+2.35=9
（2）x：

7

10

=0.3x+12．

答案

（1）2x-1

13

20

+2.35=9，

2x+0.7=9，

2x+0.7-0.7=9-0.7，

2x=8.3，

2x÷2=8.3÷2，

x=4.15；

（2）x：

7

10

=0.3x+12．

x×

10

7

=0.3x+12，

10

7

x=

3

10

x+12，

100

70

x-

21

70

x=

21

70

x-

21

70

x+12，

79

70

x=12，

79

70

x×

70

79

=12×

70

79

，

x=

840

79

，

x=10

50

79

．

完形填空

Mom had lived in a nursing home for the past three and a half years, suffering the increasing effects of dementia(老年痴呆). They were tough years, actually 21 for us family members than for her, I believe. She suffered very little __22__ in those final years, less than she __23__ when living in her own home. This was because other people took better care of her than she did herself.
All dementia is not alike. Mom’s form 24 her short-term memory more than her long-term memory. By the time she went to the nursing home, her short-term memory was _25__ non-existent. We learned to _26___ our conversations with her to old things of the past. Usually, she could connect with these __27__ and seem to enjoy us __28___ about them. I noticed in her last year that her long-term memory was __29___., too. And it became ever more __30_ to engage her. In her last six months, we had very little __31___ of her responding, though a few times she __32__us. So, when we called her, we would just __33___ to tell her about our lives, things we were doing, things our children and grandchildren were doing. The __34__ would be short. We would tell her we loved her; she would either be __35__ or make some grunting(咕哝) sounds.
__36__ I expected Mom’s death, it was still bad news to hear. She is __37___. Even one-way conversations were more __38__ than no conversations.
So now, all we have are __39__ and a few physical items that were hers or gifts from her. On Mother’s Day this year we will send no __40__, no gift, make no call. But we will remember her.

B．experiences

A．opportunity

C．expectation

A．disappointed

D．challenging

单项选择题

燃气热水器按排气方式不同分四种，居民家中禁止使用（）热水器。

A.强排式

B.直排式

C.平衡式

D.烟道式