易燃液体泄漏险情排除后,()。A.无需检测蒸汽浓度 B.急于解除警戒 C.随即恢复正

题型:单项选择题

问题:

易燃液体泄漏险情排除后,()。

A.无需检测蒸汽浓度

B.急于解除警戒

C.随即恢复正常用火用电

D.经认真检测蒸汽浓度确认无危险后,再恢复正常用火用电

考点:中级保卫员中级保卫员题库
题型:单项选择题

患者男,15岁。右膝X线平片和CT检查见下图。

对于此病变的征象,描述不正确的是()

A.右胫骨内侧平台近关节面下不规则溶骨性破坏

B.边缘可见硬化缘

C.病灶内可见多发细小点状钙化

D.可见骨膜反应

E.病变为偏心性生长

题型:单项选择题

如图所示,一起重机吊着重物沿直线匀速上升,拉力为F1,若起重机吊着重物匀速下降,拉力为F2,则F1________(填“大于”“小于”或“等于”)F2。 若在上升的过程中,钢丝绳突然断裂,重物将__________(填“先上升一段距离后下降”或“直接下降”)。

题型:单项选择题

WASHINGTON — President Obama and his wife, Michelle, handed out Halloween treats to area children and military families at the White House Sunday evening.

Local students between 6 and 14 years old, along with children from military families, were invited to celebrate Halloween on the North Lawn.

The president and first lady, along with Mrs.Obama's mother, Marian Robinson, spent about 30 minutes passing out goodie bags.Obama wished each child a happy Halloween as he distributed the treats, pausing occasionally for hugs or to comment on costumes.

Later, the military families continued the celebration inside the White House.

The first couple joked to assembled reporters about children walking the long driveway in order to work off (消化掉) the snacks."This is the Let's Move method of trick-or-treating (不给糖就捣蛋)," Obama said, referring to Mrs.Obama's campaign to combat childhood obesity (肥胖).

The goodie bags contained a box of White House M&Ms, a cookie made by pastry chef (点心师) Bill Yosses, and dried fruit.

As they made their way across the lawn, the children meet a vast range of costumed characters ranging from a spooky Frankenstein (科学怪人,小说《弗兰肯斯坦》的主角) to the Scarecrow from "The Wizard of Oz." Music from a jazz band dressed in pirate gear rang out across the White House grounds.

Multicolored pumpkins and gourds lined the driveway — individually, in gravity-defying stacks and as part of a large mound over 5 feet tall.Pumpkin-headed scarecrows (稻草人) made of cornstalks loomed over the path with menacingly raised arms.Under the White House portico, a mobile resembling bats flying through clouds fluttered around a lantern.

Some of the local trick-or-treaters were students at Bancroft Elementary, which helps tend the first lady's White House garden, and Tubman Elementary, which has a relationship with the White House chefs.

After trick-or-treating ended, the Obamas stood near the front door, welcoming the military families inside, helping children climb the short flight of steps and thanking parents for their service.

小题1:What is the news report mainly about?

A.President Obama and first lady celebrated Halloween with children.

B.President Obama and his wife Michelle handed out Halloween treats to children.

C.Children from military families were invited to celebrate Halloween at the White House.

D.Trick-or-treaters met a vast range of costumed characters from Frankenstein to the Scarecrow.小题2:From the passage, we know that ______ do not necessarily appear when people celebrate Halloween.

A.Goodie bags

B.Pumpkins and Gourds

C.White House M&Ms

D.Costumed characters小题3:When celebrating Halloween at the White House, the Obamas did the following EXCEPT______.

A.Wishing each child a happy Halloween

B.Thanking reporters for their covering the event

C.Helping children climb the short flight of steps

D.Hugging children and commenting on their costumes小题4:The passage is mainly developed by ______.

A.analyzing causes

B.making comparisons

C.examining differences

D.following the time order

题型:单项选择题

正常尿液呈什么颜色?异常情况可出现什么颜色?

题型:单项选择题

关于快速成形技术,下列说法中不正确的是()

A.不同的快速成型系统原理及构成不同,但基本原理都是“分层制造、逐层叠加”

B.快速成型技术的优点之一是促进产品创新、缩短新产品开发周期

C.快速成型技术可在不需要刀具、模具、夹具甚至产品数据的基础上快速制造出产品样件

D.快速成型技术也可以直接制作金属零件

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