已知函数f(x)=log2(3x+1),(x<3)log13x3,(x≥3),则

题型:填空题

问题:

已知函数f(x)=
log2(3x+1),(x<3)
log
1
3
x3,(x≥3)
,则f[f(
7
3
)]的值是______.
考点:函数的单调性、最值
题型:填空题

小丽同学正在对着镜子整理自己的着装,如右图所示。她身高为1.5m.她在镜中像的高度      1.5m(填“大于”、“等于”或“小于”);她到镜面的距离是0.6m,像到她的距离是      m。当她走 * * 面镜时,她的像的大小将      (填“变大”、“变小”或“不变”)。

题型:填空题

女,54岁,左胸前阵发性压榨性痛4月余就诊,Holter正常,行99Tcm-MIBI运动-静息心肌灌注显像如图,最可能的诊断为()。

A.左心室心尖梗死

B.左心室前间壁缺血

C.左心室无心肌缺血

D.左心室后壁缺血

E.左心室前侧壁缺血

题型:填空题
任务型读写(共10小题;每小题1分,满分10分)
Are you tired of the same old schedule on Mother’s Day? Well, here are some new ideas to help you enjoy that special day with your mother.
While it seems almost a tradition to take your mother out for dinner on Mother’s Day, perhaps this year you could try something else. You could invite her to a restaurant before or after the actual day. This way you don’t have to fight the crowds, and the prices will be lower.
Take your mother out for a picnic lunch if the weather is nice. You and she can enjoy the cool breeze under the shade of a tree while having a nice meal that you have made for her. Be sure to pack some of her favorite foods.
Another idea would be to invite your mother to go bowling(打保龄球). Even if she has never bowled in her life, trying something new is always interesting.
You could treat her to a movie she is dying to see, and make sure you buy her all the popcorn and candies she can eat. If you are a male, the chances are you won’t like the movie she wants to see, so instead you could go to the mall and get your picture taken with your mother, which she can proudly display in her house.
Take her to a spa on Mother’s Day. She has been working so hard and needs a way to release her stress.
If she doesn’t want to go to a spa, buy her special soaps and oils so she can relax herself in her own tub. There are various types of soaps and oils with delicious flavors available. You could also buy her some scented (芬芳的) candles that she could light by her tub to make the atmosphere peaceful.
No matter what you choose, make sure you do something special for the woman who took care of you for so long.
Title: Special ideas for Mother’s Day
Problem
Be tired of the same old schedule on Mother’s Day.
 
1) _______
Go out for dinner before or after Mother’s Day
Avoid the (2) ______
Have lower prices
 
Go out for a (3) ______ lunch
Enjoy the cool breeze under the shade of a tree
Enjoy a nice meal that you have made for her
Invite her to go bowling
Something new is always (4) ________
See a (5) ______ or take a photo with her
She can proudly display the (6) ______ in her house.
Take her to a (7) _____
She needs a way to release her stress.
Buy her special (8) _____ and oils and scented candles
She can relax in her tub and enjoy the (9) ______ atmosphere.
Conclusion
Make sure you do something (10) ____ for your mother.
 
题型:填空题

原核生物转录生成的mRNA属于

A.内含子
B.多顺反子
C.RNA聚合酶Ⅱ
D.原核RNA聚合酶口
E.多聚A聚合酶

题型:填空题

依据《生产安全事故报告和调查处理条例》事故调查组履行下列职责()。

A.查明事故发生的经过、原因、人员伤亡情况及直接经济损失

B.认定事故的性质和事故责任

C.提出对事故责任者的处理建议

D.总结事故教训,提出防范和整改措施

E.提交事故调查报告

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