100-(30.62-45+9.38)=100-45-(30.62+9.38)应

题型:判断题

问题:

100-(30.62-45+9.38)=100-45-(30.62+9.38)应用了加法交换律和结合律。[ ]

考点:小数的简便算法
题型:判断题

下列疾病可出现上述哪种表现?

房室结内折返性心动过速()

A.房室交界区的自律性增高或触发活动

B.折返回路局限与房室结内

C.折返回路是正常房室传导通道与旁道的结合

D.心房自律性增高

E.心房内多个异位节律点自律性增高

题型:判断题

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:判断题

常用的电流保护装置的接线有哪几种?各有何特点?

题型:判断题

一患者牙列缺失,预做全口义齿修复,临床医生采用印模膏取印模,由技师灌注,在脱膜时技师应先做何处理后,再进行脱膜

A.放入30℃水中
B.放入50℃水中
C.放入70℃水中
D.放入40℃水中
E.放入60℃水中

题型:判断题

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