题干

下列关于惯性的说法中,正确的是                         (  )

A:汽车刹车时,乘客的身子会向前倾斜,是因为汽车有惯性

B:做匀速直线运动的物体和静止的物体没有惯性

C:物体的惯性只有在物体速度改变时才表现出来

D:物体都具有惯性,与物体是否运动无关,与物体速度是否变化也无关

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D

同类题3

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每个人都是圣诞老人

    故事的主人公是一位外国小女孩儿,她美丽的妈妈病倒了,病得连头发都掉光了。圣诞节来临前,小女孩儿到药店给妈妈买药,路过一家商店时,她看见橱窗里摆着一款漂亮的黄色假发,她就想:这假发多像妈妈的头发呀,如果我把它作为圣诞礼物送给妈妈,那该多好呀!于是,这个小女孩儿就走进商店,找到大胡子老板说:“叔叔,我用这条项链换你这顶假发可以吗?”大胡子老板看了看她的项链说:“孩子,你这项链最多值2元钱,而这假发要卖15元钱呀!”小女孩儿的脸红了,她恳求老板在圣诞节前千万别卖掉假发。

    接下来的几天里,小女孩儿想尽了一切办法去赚钱,但直到圣诞节的前一天晚上,她才赚了1元钱。她拿着这钱,带着费尽心机在山上采的野蜂蜜,抱着试试看的心态再次来到商店。她找到大胡子老板说:“____________________________________________________”

    大胡子老板看着她手臂上的伤痕和手上的一把零钱,沉吟了一下,遗憾地说:“真抱歉,假发已经卖出去了。”

    第二天早晨,小女孩儿一睁开眼,就发现枕边有一个包裹,包裹里正是那顶假发!里面的一张纸条上写着:你有一颗纯洁的心,孩子,这是送给你妈妈的圣诞礼物。祝你快乐!圣诞老人。

同类题4

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    Come to the AG Society's expedition (探险) program and you will surely get unique experiences!

SWIM WITH THE HUMPBACKS OF TONGA

Dairen Jew and his team are your hosts for an unforgettable AG Society adventure, filled with in-water meetings with humpback whales (座头鲸) in the Kingdom of Tonga's group of islands.

WHO: Darren Jew's Whales Underwater

DATES: 26 September-4 October 2018

COST: $ 5,450 per person

BOOKINGS: Call 0756679413, email reservations @ whalesunderwater.com or visit whalesunderwater.com

11-DAY KIMBERLEY COAST CRUISE

The AG Society is partnering with APT to present an exciting voyage along the Kimberley coastline from Broome to Darwin. Expedition cruising offers the easiest way to explore the Kimberley. Guests on this 11-day voyage will go ashore, explore natural wonders, meet traditional owners, see rock art and spot wildlife.

WHO: APT

DATES: 6-16 September 2018

COST: $ 13,395 per person

BOOKINGS: Visit kimberleywilderness.com.au

LIGHTNING RIDGE FOSSIL DIG

The AG Society offers you a chance to hunt for fossils (化石). Guided by experts, you'll go to special locations, seeking new fossils for the collections of the Australian Opal Centre. Your discoveries will further establish these museum collections as a world-class scientific and cultural resource. There are also a series of lectures on mining history, fossils, dinosaur hunting and new dinosaurs.

WHO: Australian Opal Centre

DATES: 20-25 August 2018

COST: $ 2,200 per person, including all activities and lunches and dinners

BOOKINGS: Call 0427904587, email dig @ australianopalcentre.com or visit australian opalcentre. com

AG DKVIL ARK FXPEDITION

Come and join Tim Faulkner for a unique hands-on experience with this Tasmanian devil (袋獾) feeding program in the beautiful Barrington Tops of NSW. You'll get to see devils up close as you assist with feeding individuals. In addition to working with the animals, there'll be opportunities to explore the area's natural treasures and spot local wildlife. Don't miss your chance to get involved in this important conservation effort.

WHO: Devil Ark

DATES: 24-26 November 2018

COST: $ 1,750 per person

BOOKINGS: Call 0243408610, email info@ devilark.org. au or visit devilark.org. au