已知直线l1:(m+2)x+(m+3)y﹣5=0和直线l2:6x+(2m﹣1)=

题型:解答题

问题:

已知直线l1:(m+2)x+(m+3)y﹣5=0和直线l2:6x+(2m﹣1)=5,求满足下列条件的实数m的取值范围或取值:

(1)l1∥l2

(2)l1⊥l2

考点:两直线平行、垂直的判定与性质
题型:解答题

若用○和●分别表示两种不同的原子,则下列示意图表示混合物的是(  )

A.

B.

C.

D.

题型:解答题

北沙参、麦冬的共同功效是()

A.养阴润肺

B.清心除烦

C.清胃热生津

D.润肠通便

E.益气化痰

题型:解答题

X射线机检查员在识别一幅X光机图像时应做到()进行判图。

A.从图像周围向中间

B.按照图像灰度的不同

C.按照图像所呈现的亮度的不同

D.结合图像辨别方法来辅助

题型:解答题

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop".

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) . She had only one small, flat bag with a few candies—fiftycent candies! I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

6()

A.shopping 

B.travelling 

C.parties 

D.greetings

题型:解答题

中国(上海)自贸区对外资管理将实现由“正面清单”向“负面清单”的转变。在负面清单上,国家明确开列不予外商投资准入或有限制要求的领域,清单以外领域则充分开放这种“法无禁止即合法”的管理思路,有利于()

①实行强有力的宏观调控

②市场配置资源作用的发挥

③利于促进外贸转型升级

④激发企业的市场主体活力

A.①②

B.①③

C.②④

D.③④

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