若(anbm)3=a9b15,则mn=( )。

题型:填空题

问题:

若(anbm3=a9b15,则mn=(    )。

考点:整式的乘法
题型:填空题

下列有关地球自转和公转的说法错误的是(  )

A.公转的周期为一年

B.地球围绕太阳公转

C.自转的方向是自西向东

D.自转产生四季现象

题型:填空题

Asherman综合征是()

A.染色体异常闭经

B.垂体功能低下闭经

C.闭经溢乳综合征

D.子宫内膜损伤、宫腔粘连的闭经

E.先天性子宫缺如的闭经

题型:填空题

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.

12().

A.toys 

B.clothes 

C.presents 

D.bills

题型:填空题

A型药物不良反应的特点不包括

A.死亡率高
B.发生率高
C.可以预测
D.与给药剂量有关
E.常规毒理学筛选可以发现

题型:填空题

以下不属于漆膜外观的是()。

A、透明状况

B、硬度

C、光泽度

D、涂膜表面外观

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