小宇以一定的速度将石子向斜上方抛出去,石子所做的运动叫斜抛运动.他想:怎样才能将

题型:探究题

问题:

小宇以一定的速度将石子向斜上方抛出去,石子所做的运动叫斜抛运动.他想:怎样才能将石子抛得更远呢?于是他找来小丽一起做如下探究:他们用如图所示的装置做实验,保持容器水平,让喷水嘴的位置不变,用开关控制喷水的速度.

(1)首先让喷水嘴的方向不变(即抛射角不变),做了3次实验:第一次让水的喷出速度较小,这时水喷出后落在容器的A点;第二次,让水的喷出速度稍大,水喷出后落在容器的B点;第三次,让水的喷出速度最大,水喷出后落在容器的C点.如图,小宇和小丽经过分析得出如下结论:在_________一定时,当物体抛出的_________越大,抛出的距离就越远.小丽回忆起上体育课时的情景,想起了几个应用上述结论的例子,其中之一就是_________.

(2)控制开关,让水喷出的速度不变,让水沿不同方向喷出,如图所示,又做了几次实验,得到如下数据:

小宇和小丽对上述数据进行了归纳和分析,得出的结论是:在_________一定时,随着物体抛出时与水平方向夹角的增大,抛出距离先是越来越_________,然后越来越_________.当夹角为_________时,抛出距离最大.这天,在运动会上,小艾很恼火地问:“为什么我在投标枪时甩力很大,投得很高,可是成绩仍不理想?,小宇听后哈哈一笑,解释道:“这是由于你投出的方向与水平面的夹角不合适.要想投出好成绩,理想的角度应该是_________左右.小艾听后恍然大悟.

(3)小宇和小丽总结了上述探究过程,他们明确了斜抛物体在水平方向上飞行的距离与__________和________的关系,他们感到这次探究的成功得益于在探究过程中两次较好地运用了_________(选填“等效法”、“控制变量法”、“建模法”、“类比法”,只填一种)

考点:控制变量法和科学探究的过程
题型:探究题

下列加点的字读音全对的一项是(  )

A.怨mái哀dònɡ巾guān堪kuài

B.暖zhà亲qì罗qí列guàn

C.挛jìnɡ害qiāng弓nǔ刎jǐng

D.候sì cén pì罪qiān

题型:探究题

混睛障属肝胆热毒型,首选的方剂是()。

A.龙胆泻肝汤

B.三仁汤

C.羌活胜风汤

D.银花解毒汤

E.抑阳酒连散

题型:探究题

下列哪项数值提示胎儿肾已成熟()

A.羊水中肌酐值≥3mg/dl

B.孕妇尿中E/C比值>15

C.羊水中肌酐值≥176.8μmol/L

D.羊水中HPL值>4mg/L

E.羊水中肌酐值≥1808uμmol/L

题型:探究题

Part 4


Questions 26-45


·Read the following passage and decide which answer best fits each space.
·Forquestions26-45, markoneletterA, B, C or D on the Answer Sheet.
Both (26) and zoology are parts of a more general field of science, biology. The two are studies of (27) things, which share certain characteristics, (28) they are plants or animals. Botany deals with plants, whose organisms that can (29) their own food by the use of sunlight. Zoology on (30) hand, deals with animals, those organisms that cannot manufacture their own food and are thus dependent (31) plants for their food.
(32) plants and animals share many abilities, the extent (33) which plants can exercise some of those abilities is (34) . For example, both plants and animals need food, water, and warmth for growth, (35) plants can move to (36) those needs only by the slow extraction of their leaves and roots, while animals can move relatively (37) distances in relatively little time. When an animal is hurt with needle, the animal will (38) the part of the body (39) . This ability to draw back (40) pain or irritation, called irritability, is found only to a very limited extent in plants.
If plants (41) the same (42) as animals, animals would have had a more difficult time finding food. If animals were as limited as plants, they might (43) a means of manufacturing their own food, as plants do now. The world would be a very different place (44) it is if the characteristics of plants and animals were (45)

A.whether

B.and

C.both

D.all

题型:探究题

第21-25 题为套题:2007 年1 月1 日,30 周岁的王太太以自己为被保险人投保了一份万能型终身寿险,一次性交纳保险费10 万元,初始费用5000 元。若王太太在保单有效期内不幸身故,保险公司给付身故时保单账户价值的105%。假设客户从万能险账户部分提取账户价值免收手续费,各保单年度的退保费用如下所示:第一年度第二年度第三年度第四年度第五年度及以后 5% 4%3%2% 0

若该万能保险账户每年结算利率均为4%,2007 年12 月31 日王太太从个人账户提取资金5 万元,2008 年12 月31 日王太太不幸身故,那么保险公司将给付身故保险金( )万元。

A.(9.5×1.04-5)×1.04

B.(10×1.04-5)×1.05

C.(9.5×1.04-5)×1.04×1.05

D.(10×1.04-5)×1.04×1.05

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